This allows removing it from `class_db.h`, significantly reducing the amount of files
that include it transitively.
Also includes some include cleanup in `control.h` and `rich_text_label.h` done while
ensure they don't depend on `callable_mp`.
configured `InputEvent` in the plugin
This allows undo and redo, and can mark in time whether the handled
`InputEvent` resource is edited.
`command_or_control_autoremap` needs to be handled separately, as
its value will change the usage of other properties.