Point brick xml

Changed degrees from double to formula in PointIntoDirectionBrick + removed dialog.

Jenkins testruns:
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/746/
(Strings already deleted)

testScreenshot:
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-single-UI-test/500/