changed Details textcolor from grey to white
fixes #521

* Wrote test for activity started from actionbar
* Fixed issue #521
Merge pull request #538 from Catrobat/issue#415

changed Details textcolor from grey to white
Merge pull request #536 from Catrobat/issue#521

fixes #521
repackaged for merge
Merge remote-tracking branch 'origin/master' into Annotations2
repackaging