s/profile/kit/

* Rename profiles to kits.
* Update some strings:
   * projects mode has a Kits tab, not a Targets tab.
   * " Settings" was dropped from the sub-tabs of the Kits tab
   * menu entry "Build/Open Build/Run Target Selector" was renamed
     to "Build/Open Build and Run Kits Selector".
   * Use "Kit" instead of "Target" in miniprojecttargetselector.
     (The class was not renamed as it does indeed select targets,
      not kits)

Change-Id: I0727e086e2dfa0e8aaaf89fdc6f2e3596c7a4314
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>