Icons in the right/ side/ control panel

[dan-fritchman]

The idea is that:

• (a) Every "command" or "action" take-able in any given state has both a shortcut key, and a sidebar clickable
• (b) The sidebar clickables consist of (1) a little logo, (2) a description, and (3) an indication of the shortcut key.
  • The latter would preferably make it very clear that it's saying "press this key to do that"

[dan-fritchman]

The changes in d184f66 make a little SVG icon for each shortcutKey.

Had been hoping to, at least in AddInstance mode, also drop in a small SVG image of the symbol. This proved a bit more of a pain than planned, as the React/ MUI libraries it uses don't really want SVG from strings.

So for now it looks like so: