[IMP] in messaging/Organizer/Categories rename Categories into Stage
[IMP] remove or lable & add close button in footer of embed form
[IMP] improve code
[IMP]: Improve string
[MERGE]
[MERGE] with trunk
[MERGE] with trunk
[MERGE] with trunk
[MERGE] with trunk
[MERGE]
[MERGE] merge with trunk
[IMP] improve code
[MERGE] with trunk
[MERGE] with trunk
[MERGE] with trunk
[IMP] rename menu from 'stage' to 'stages'
[MERGE] with trunk
[MERGE] note: Rename Categories into Stages
[FIX] app_descriptions: typo
[MERGE] app_descr: typo fixes