Core: Add method to get the tooltip for the showOptionsDialog

Change-Id: Icf473145f615f8ea80887f9620ca95af812d0c98
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Unify "missing compiler" and "missing build configuration" tasks

Everybody used to do their own thing...

Also unify the "Configuration is faulty" message we write into the
Application output window.

Change-Id: I0e5c4ec68155d66aa1d0ea53134b98917869e5c6
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
TaskHandler: Add task handler that let's you jump into the configuration

... wire it up so that "No compiler found in kit" gets you to the kits
page.

Change-Id: Ie7b34d285a6d2eef81ccd5fdc86d91bcd0254515
Reviewed-by: Eike Ziller <eike.ziller@digia.com>