GUI+REGISTRAR: fixed vo-group application usecase

 - fixed missing some params when redirecting
 - fixed reading of correct params from URL
 - redirect existing when outside extension period
 - redirect new if duplicate registration attempt
 - fixed case, when user is not yet member of VO and have group application submitted
 - fixed case, when user is member of vo and want apply to group (in extension period)
 - code formatting, translation fixes