Removed tasks from burndown, only worklog list now used ( less DB queries )
-WorkLogService now ask for LocalDate -1 /+1 instead of DateTime to prevent odd worklogs from late hours
Some L&F changes + code cleaning
-fix bug allowing to change state to the same one
-add localized datepicker
-Finished WorkLog changes
TODO: move datepicker as common for all screens and allow locale switching