Fix issue #285: Defect in SetLookBrick-Spinner
SetLookBrick-Spinner is correctly updated after adding a new Look
Also fix handling of Fragment BackStackEntries
Merge branch 'master' into DefectInSetLookBrickSpinner
Merge branch 'master' into DefectInSetLookBrickSpinner
Merge branch 'master' into DefectInSetLookBrickSpinner
Merge pull request #311 from Catrobat/DefectInSetLookBrickSpinner

Defect in set look brick spinner