* prevent too long values for user preferences
* add chart value 0 to y-axis if last value > 0, to always display the zero line (project details)
* add user-preferences to invoice hydrator
* DateTime vs DateTimeInterface
* simplify permission config
* fix query for teamleads limiting to only selected teams not possible
* login redirects to homepage if already being logged-in
* fix budget check for entries that were moved to another moth
* invoice: fix amount should be decimal if decimal template is used
* added new month grouped by project/activity/user report
