Comment 2 for bug 1358250

Some design concepts I have:
(which I may do if you approve)
- change bold, italic, underline, and strikethrough to symbolic icons
  - bold = format-text-bold-symbolic
  - italic = format-text-italic-symbolic
  - underline = format-text-underline-symbolic
  - strikethrough = format-text-strikethrough-symbolic
- I think formatting / paragraph button should be:
  - Gtk.ComboBox
- Alignment options should be symbolic icons, too:
  - left = format-justify-left-symbolic
  - center = format-justify-center-symbolic
  - right = format-justify-right-symbolic
  - fill = format-justify-fill-symbolic
- Insert should be the symbolic icon, too:
  - insert = insert-text-symbolic

Now, EditorView, should be designed with the following:
(these are mostly notes for me personally)
- make one-inch margins (some spacing on top, bottom, sides, etc.)
- add background image like a scratch-colored page (like skin color; similar to Noise (Music)'s "albumart")

Possibilities
- Add tab bar

I will make a mock-up soon.