[GSoC] Formula Editor Lists

https://jenkins.catrob.at/view/All-Categories/view/Catroid-multi-job/job/Catroid-Multi-Job-Custom-Branch-RELOADED/418/
As dicussed with @wslany in #1110 we only should increase the Catrobat Language Version (CLV) if we release a new version in Google Play. The CLV already was increased from 0.92 to 0.93 in the String upgrade (https://github.com/Catrobat/Catroid/pull/970/files#diff-7).  For now we stay at 0.93. ;)