Editor icon set hard to read

[Routhinator]

Just some feedback here, but while most of this iconset is great, the editor icons (heading, bold, italic) are really hard to read. For some reason the choice was made to, instead of using simple line-based letters, provide an outline version of the letters in serif style - this creates a look for these that is harder to read and less clear than a simple line, and also doesn't really match the rest of the icon set. Even the paragraph icon is just a simple line design and not an outline, so putting it beside the others in toolbar makes them look like they are from different sets..

I think we at least need an alternative style for these that aligns with the rest of the icon set.