Remove unused code in ScriptFragment
Merge pull request #793 from Catrobat/remove_unused_in_scriptfragment

Remove unused code in ScriptFragment
Delete duplicate rename function in ProjectManager

Got rid of a rename function that was an almost exact duplicate of
another. In the sake of "single responsibility per method", I removed it
and adopted the code as necessary.
Merge pull request #788 from Catrobat/refactor_renaming

Delete duplicate rename function in ProjectManager
Fix several issues concerning NestingBricks and ActionMode
Remove call to saveProject in addNewBrick

saveProject should not be called whenever a brick is added. Every new brick added
would cause the project to be saved which would take some thime if the project
already has many objects.
Merge pull request #768 from Catrobat/ForceCloseWhenCopyingForeverLoopsFromActionMode

Fix several issues concerning NestingBricks and ActionMode
Fix #759
Merge branch 'master' into issue#665