Operation not possible if focus is elsewhere

1. Open score.
2. Click 'Play' (on toolbar).
3. Click 'Rewind' (on toolbar).
4. Press Spacebar or Enter (on keyboard).

Expected result: The score plays/pauses.

Actual result: The score rewinds.

Workaround: Use mouse for toolbar/menu actions.

Note: It applies to other items in the toolbar (e.g. Loop) and menus (e.g. Undo) - also when not in playback mode.

Using MuseScore 2.0 Nightly Build (244f40d) - Mac 10.7.5.