enh(ui): change controls Play/Pause/stop shortcuts
Description
The controls.xml config handles the common camera Play/pause/stop and ,is used in several other configs.
The present shortcuts used to play and pause is the "space".
However, the space is the most accessible key, and it is expected to be used for the most common action in the apps. (Which is often not the play/pause).
To free the space shortcut access, the shortcuts in the controls.xml will be set through parameters.
Functional specifications
with a controls.xml config in an app, it should be possible to play/pause/stop with the p/s key.
Technical specifications
Add playShortCut pauseShortCut stopShortCut parameters in the controls.xml. Connect it to the play/pause/stop shortcuts.
use "space" as default for play pause, and "s" for stop.