Have a button to compile all "uncompiled" class in the subtab added in issue 204

[VinceFINET]

Have a button to compile all "uncompiled" classes in the subtab added in issue #204 In addition or by replacement of the current button.

As this process is async we will need to have a waiting system and/or a wait to show the status of the current compilation. Need to mock this in the dedicated subtab...