Make "Auto-load preset" fall back to memorized custom mappings when FX unfocused

[helgoboss]

This would make it possible to have the apparently popular scenario "Normally I want mappings A but when plug-in is focused I want mappings B." possible with just one instance (and without "Make instance superior).

For this it would probably make sense to add a new option <Memory> in the preset menu - and then fall back to it (= loading memorized custom mappings) instead of to <None> (= clearing all mappings).

[helgoboss]

An alternative is to not load the mappings into the session at all but to sync them to the processing layer and add a small but prominent UI info that the currently displayed mappings are not the active ones but that preset "Bla" is active. Then we could easily fall back to the displayed mappings and wouldn't even need to make the instance read-only.

[tompad2]

Would be great!