+ Added About Dialog
~ fix: Options Menu in TaskDetails Pager
+ Prepare for Submission Type TextView in TaskDetails
* switched to 2 view types in in Chat List
~ fix: right aligned chats partially out of screen
* show "check" in Task Overview even if the number of Submission is unlimited
+ prepared for "new marker" in chat list
~ fix: scrolling in submit_new_solution
~ fix: completed translation