Missing commands

[MarcSabatella]

Right now, there are still a number of commands that seem not implemented. Some command I know were conscious removed, but some might have just called through the cracks. It would be really nice to pin some of this down by beta for documentation purposes, but I'm not sure anyone really has a handle on what all is left, so I thought I'd make an effort to do so here.

The following commands are ones that existed in MU3 but don't seem to exist at all anymore:

1. Enter rest (TAB)
2. Apply current palette element
3. Zoom to page width / previous magnification level
4. Show symbol palette / key signature palette / time signature palette (three separate but related commands)

I believe the first should be fixed before beta, but absolutely needs to be fixed before release - it's all but impossible to figure out a way to enter rests in tablature right now. See #11736. I see it's only a P2, hence my concern.

The others are more quality-of-life issues, but pretty big ones, I think, which is why I'm bringing this up. The first one - apply current palette element - is especially big for accessibility, but also anyone who uses the keyboard a lot. The three commands for showing the different palettes is perhaps tricky because these are really just sections of the Master Palette, and there is a shortcut for that.

There are also some commands where the shortcut is changing, and I also hope that happens before beta, or documentation is going to be adversely affected. The relevant changes I know about are:

• Set default shortcuts for toggling accidentals and ties #11536
• fix:#11844; Changed toggle insert action functionality #11854

The first of these looks like it is on the radar, but the second might have been forgotten about.