基于vue+element的在线拖拽生成表单页面，支持属性设置实时响应

Version 4.8.4 (2018-10-23) Added support for the HTML5 `main` element. #TINY-1877 Changed the keyboard shortcut to move focus to contextual toolbars to Ctrl+F9. #TINY-1812 Fixed a bug where content css could not be loaded from another domain. #TINY-1891 Fixed a bug on FireFox where the cursor would get stuck between two contenteditable false inline elements located inside of the same block element divided by a BR. #TINY-1878 Fixed a bug with the insertContent method where nonbreaking spaces would be inserted incorrectly. #TINY-1868 Fixed a bug where the toolbar of the inline editor would not be visible in some scenarios. #TINY-1862 Fixed a bug where removing the editor while more than one notification was open would throw an error. #TINY-1845 Fixed a bug where the menubutton would be rendered on top of the menu if the viewport didn't have enough height. #TINY-1678 Fixed a bug with the annotations api where annotating collapsed selections caused problems. #TBS-2449 Fixed a bug where wbr elements were being transformed into whitespace when using the Paste Plugin's paste as text setting. #GH-4638 Fixed a bug where the Search and Replace didn't replace spaces correctly. #GH-4632 Fixed a bug with sublist items not persisting selection. #GH-4628 Fixed a bug with mceInsertRawHTML command not working as expected. #GH-4625 Version 4.8.3 (2018-09-13) Fixed a bug where the Wordcount Plugin didn't correctly count words within tables on IE11. #TINY-1770 Fixed a bug where it wasn't possible to move the caret out of a table on IE11 and Firefox. #TINY-1682 Fixed a bug where merging empty blocks didn't work as expected, sometimes causing content to be deleted. #TINY-1781 Fixed a bug where the Textcolor Plugin didn't show the correct current color. #TINY-1810 Fixed a bug where clear formatting with a collapsed selection would sometimes clear formatting from more content than expected. #TINY-1813 #TINY-1821 Fixed a bug with the Table Plugin where it wasn't possible to keyboard navigate to the caption. #TINY-1818 Version 4.8.2 (2018-08-09) Moved annotator from "experimental" to "annotator" object on editor. #TBS-2398 Improved the multiclick normalization across browsers. #TINY-1788 Fixed a bug where running getSelectedBlocks with a collapsed selection between block elements would produce incorrect results. #TINY-1787 Fixed a bug where the ScriptLoaders loadScript method would not work as expected in FireFox when loaded on the same page as a ShadowDOM polyfill. #TINY-1786 Removed reference to ShadowDOM event.path as Blink based browsers now support event.composedPath. #TINY-1785 Fixed a bug where a reference to localStorage would throw an "access denied" error in IE11 with strict security settings. #TINY-1782 Fixed a bug where pasting using the toolbar button on an inline editor in IE11 would cause a looping behaviour. #TINY-1768 Version 4.8.1 (2018-07-26) Fixed a bug where the content of inline editors was being cleaned on every call of `editor.save()`. #TINY-1783 Fixed a bug where the arrow of the Inlite Theme toolbar was being rendered incorrectly in RTL mode. #TINY-1776 Fixed a bug with the Paste Plugin where pasting after inline contenteditable false elements moved the caret to the end of the line. #TINY-1758 Version 4.8.0 (2018-06-27) Added new "experimental" object in editor, with initial Annotator API. #TBS-2374 Fixed a bug where deleting paragraphs inside of table cells would delete the whole table cell. #TINY-1759 Fixed a bug in the Table Plugin where removing row height set on the row properties dialog did not update the table. #TINY-1730 Fixed a bug with the font select toolbar item didn't update correctly. #TINY-1683 Fixed a bug where all bogus elements would not be deleted when removing an inline editor. #TINY-1669 Version 4.7.13 (2018-05-16) Fixed a bug where Edge 17 wouldn't be able to select images or tables. #TINY-1679 Fixed issue where whitespace wasn't preserved when the editor was initialized on pre elements. #TINY-1649 Fixed a bug with the fontselect dropdowns throwing an error if the editor was hidden in Firefox. #TINY-1664 Fixed a bug where it wasn't possible to merge table cells on IE 11. #TINY-1671 Fixed a bug where textcolor wasn't applying properly on IE 11 in some situations. #TINY-1663 Fixed a bug where the justifyfull command state wasn't working correctly. #TINY-1677 Fixed a bug where the styles wasn't updated correctly when resizing some tables. #TINY-1668 Added missing code menu item from the default menu config. #TINY-1648 Added new align button for combining the separate align buttons into a menu button. #TINY-1652 Version 4.7.12 (2018-05-03) Added an option to filter out image svg data urls. Added support for html5 details and summary elements. Changed so the mce-abs-layout-item css rule targets html instead of body. Patch contributed by nazar-pc. Fixed a bug where the "read" step on the mobile theme was still present on android mobile browsers. Fixed a bug where all images in the editor document would reload on any editor change. Fixed a bug with the Table Plugin where ObjectResized event wasn't being triggered on column resize. Fixed so the selection is set to the first suitable caret position after editor.setContent called. Fixed so links with xlink:href attributes are filtered correctly to prevent XSS. Fixed a bug on IE11 where pasting content into an inline editor initialized on a heading element would create new editable elements. Fixed a bug where readonly mode would not work as expected when the editor contained contentEditable=true elements. Fixed a bug where the Link Plugin would throw an error when used together with the webcomponents polyfill. Patch contributed by 4esnog. Fixed a bug where the "Powered by TinyMCE" branding link would break on XHTML pages. Patch contributed by tistre. Fixed a bug where the same id would be used in the blobcache for all pasted images. Patch contributed by thorn0. Version 4.7.11 (2018-04-11) Added a new imagetools_credentials_hosts option to the Imagetools Plugin. Fixed a bug where toggling a list containing empty LIs would throw an error. Patch contributed by bradleyke. Fixed a bug where applying block styles to a text with the caret at the end of the paragraph would select all text in the paragraph. Fixed a bug where toggling on the Spellchecker Plugin would trigger isDirty on the editor. Fixed a bug where it was possible to enter content into selection bookmark spans. Fixed a bug where if a non paragraph block was configured in forced_root_block the editor.getContent method would return incorrect values with an empty editor. Fixed a bug where dropdown menu panels stayed open and fixed in position when dragging dialog windows. Fixed a bug where it wasn't possible to extend table cells with the space button in Safari. Fixed a bug where the setupeditor event would thrown an error when using the Compat3x Plugin. Fixed a bug where an error was thrown in FontInfo when called on a detached element. Version 4.7.10 (2018-04-03) Removed the "read" step from the mobile theme. Added normalization of triple clicks across browsers in the editor. Added a `hasFocus` method to the editor that checks if the editor has focus. Added correct icon to the Nonbreaking Plugin menu item. Fixed so the `getContent`/`setContent` methods work even if the editor is not initialized. Fixed a bug with the Media Plugin where query strings were being stripped from youtube links. Fixed a bug where image styles were changed/removed when opening and closing the Image Plugin dialog. Fixed a bug in the Table Plugin where some table cell styles were not corre