[IMP]convert subtypes list into selection.
[IMP]improve spacing.
[IMP]mail_followers: remove li from dropdown and keep table as it is.
[MERGE]sync with trunk and resolve conflicts.
[IMP]mail_follower:improved subtype selection event to keep dropdown list open untill click outside of dropdown or on the follow/unfollow button.
[IMP]improved spacing.
[MERGE]sync with trunk.
[IMP]solved Error Cannot read property 'target' of undefined.
[MERGE]sync with trunk.
[IMP]mail_follower:closed dropdown when there is no child element in ul.
[MERGE]sync with trunk.
[MERGE]sync with trunk.
[MRG]Merge with lp:openobject-addons
[MERGE]sync with trunk.
[IMP]disabled dropdown button when there is no item in dropdown.
[MERGE]sync with trunk.
[IMP] event: add trigger field for stored seats_* fields and remove print
[MERGE] [IMP] mail: followers widget: Follow button + subtypes are now displayed
like a button + a dropdown selection for subtypes, reducing the place this widget
takes in the form view.
[IMP] mail: jump to the Messaging menu after installation
[IMP] track translatable