Allow space to control playback after clicking elements that do not require keyboard focus.
Currently, if any element has focus, spacebar will not work to start/stop playback. This is a high-friction user experience when, for example, you mouse over to the mixer and mute a track. You then hit spacebar to start playback and... the track unmutes. It's unexpected, and not particularly useful.
There are probably good accessibility reasons to have this type of behavior available (?), but I would suggest that for most users this is a frustrating experience, so it would be great if there was at least an option to always send spacebar keypresses to the main score window (unless they are consumed, obviously, in e.g. a text field.)
This is a very common pattern in DAWs, video editors, etc: the spacebar is a near-universal key for playback start/stop, and in almost all software it maps to that function from most parts of the program. I believe MuseScore would benefit greatly from adopting this pattern.
There are other bug reports related to this (e.g. https://musescore.org/en/node/37061 ) but they were a bit more specific, so I filed this general one -- I hope that's OK.