Fixed a lot of template bugs from irc test session

- agenda overview: Text align right for duration column.
- item summary slide: Show 'get_title_supplement' after each related agenda item.
- item detail view: Add ":" in button after item content_type
- projector: Show <hr> below title/subtitle line.
- motion view: Check manage permission for delete version button in version history table.
- motion detail view: Update version authorized badges and go to buttons.
- motion list: Link warning icon to newest version.
- assignment detail view: Added ballot paper pdf button.
- Group slide and overview: Show members.
- Use dynamic title column width in participants pdf.
- Fixed missing translations in user settings form.
- IE8/9 fix for projector template style.