Fix membership admin actions
- Require POST request in membership reject/remove views- Fix members table actions cell content- Fix reject/remove actions urls
Remove manual transaction management in project detail.
Merge branch 'latest-quota' of https://code.grnet.gr/git/synnefo into latest-quota
Project members table administration actions column
Fix user projects filter
Membership policies kept in settings instead of db
Internationalize project application help text fields
str for Project and ProjectMembership
Project deactivation/termination
Change member join/leave policy descriptions
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