Fix tests

ProjectActivityTest.testCopySprite:
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-single-UI-test/934/

ScriptFragmentTest.testOptionsMenuItems:
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-single-UI-test/935/
(Delete should be in the overflow menu now because copy is outside)

SoundFragmentTest.testCopySoundContextMenu:
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-single-UI-test/937/