Launchpad automatic translations update.
[FIX] calendar: correct recurrency end date computation
[MERGE] forward port of branch 7.0 up to revid 9902 chs@openerp.com-20140314094809-0wuus62tob8vtyi0
[FIX] mail.thread: avoid error if `message_unread_count` has been popped 1 line earlier
[MERGE] forward port of branch 7.0 up to revid 9903 odo@openerp.com-20140314104605-qi7eqj2g37dvxvc3
[FIX] share wizard: delete wizard lines in cascade
[FIX] pad: improve pad bootstrap, prevent creating useless empty pads, avoid edition warning in read-only mode for new pads, translate messages

Added a small method to detect the proper server configuration,
and make it degrade gracefully if the method is not present.
This avoids having to force a pad URL generation in order to
test the config (possibly creating useless pads).
Add a user-friendly message when the pad has not yet been
initialized for a given record, in read-only mode.
[MERGE] Forward port of 7.0 fixes up to rev 9905 odo@openerp.com-20140314131849-rnjvk1pqpiyvtc1c