Options to resize & rotate symbols

[XiaoMigros]

Resolves: #17116
Resolves: #18462
Resolves: #15522

This PR introduces the options to scale and rotate symbol elements. These options can be managed via the properties tab, where it's now possible to change the symbol's font as well.

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[bkunda]

@XiaoMigros I'd love to be able to review this, but the macOS build appears to have failed.

[XiaoMigros]

Very sorry about that, @cbjeukendrup has told me that I'm not the only encountering this issue so I hope it can be resolved soon..

[Jojo-Schmitz]

That failure looks similar to that from #21360

As other more recent PRs succeed, maybe a rebase helps?

[XiaoMigros]

Seems to have worked!

[bkunda]

Nice work @XiaoMigros :-)

1. I wonder whether we really need the font dropdown? @oktophonie do any of the other music fonts currently support the symbols in the master palette?
2. We need an icon for the button in properties (visible when multiple elements are selected).

I'd suggest @jessjwilliamson or @avvvvve whip up something for this and update the musescoreicon font (I don't mind who does it – you both can decide among yourselves :-))

[oktophonie]

You can choose what music font to use in the master palette (by default, as of this PR, it'll be whatever music symbols font is currently in force). The font dropdown in Properties is the only means of changing this (which you may want or need to do it you ever change the music font, or for other supremely niche reasons).

The master palette shows SMuFL symbols, so they can exist in any SMuFL font.

[cbjeukendrup]

A few minor comments, but generally looks good!