Realize Chord Symbols command in context menu executes before dialog appears

1) empty score
2) add a chord symbol
3) right-click it
4) Realize Chord Symbols

Result: the action takes place before the dialog appears. The dialog then gives you the option to override settings, and when you hit OK, the action is executed again, with perhaps customized settings, possibly leaving remnants of the old realization behind (if you changed duration, for example).

It's not that big a deal, but I'd like to fix this for 3.5.1.

I think @anatoly-os and I stepped on each other's toes a little and inadvertently caused this. The original implementation had an issue - common to other context menu commands - where there was confusion over whether to apply the command to the selection or to what was right-clicked. This was #305739: Realize chord symbols dialog won't open, even though the option is displayed in the menu, which was fixed in https://github.com/musescore/MuseScore/pull/6128. However, I think this fix accidentally removed the handler for the command in the Tools menu, which led to that command become inoperative - #308023: Nothing happens when select Realize chord symbols via tools->Realize chord symbols. This was fixed by reinstating a command handler in https://github.com/musescore/MuseScore/pull/6348. This unfortunately caused the double handling of the context menu.

We have had quite a few bugs that come from these sort of interactions, so while I plan to address this directly for 3.x, I'm hoping to discover the whole system just works better for 4.0 :-)