Merge pull request #233 from frank-ulrich-weber/configurable_identifier_regex

Configurable identifier regex
Modified display format of the calendar editor
Remove granularity if it was temporarily added
Change type of number of pages input from total to per issue
Statically show apply link on granularity page
Add lock if number of pages per process is too small
Add "go back" button to granularity page
Fix loosing of data when going back and returning to granularity screen
Merge remote-tracking branch 'origin/new-layout' into feature-zm_all