[l10n] Updated help Italian translation.
Updated Hebrew translation
Sharpen count badges in sidebar
Reduce workload during search table re-population
Use IN rather than OR to avoid SQLite error w/ large queries
Increase window size during background prefetch

This will speed up the process of synchronizing with the server at
the cost of increasing delays when the user requests immediate
information, but experience shows this is worth it.

This also fixes a minor bug where closing the folder is not detected
during prefetch.
Add Italian to CMake's list of help translations
Support file path and URI attachment paths: Closes bgo@726770

Prior fix to support xdg-email attachment paths broke support for
nautilus-sendto and LibreOffice.  This remedies for all situations.
Prevent AccountSynchronizier from deadlocking under certain conditions

The AccountSynchronizer could deadlock waiting for an EmailPrefetcher
to finish under certain conditions, particularly if the folder closed
before the prefetcher was finished.  This lead to a state where the
AccountSynchronizer would never synchronize against unopened folders.
If Geary was left open for a long time and the user clicked on All
Mail, rather than the current state of that folder appearing
immediately, it could take a moment for Geary to fetch the envelopes
and headers/bodies.

Fixing this closes bgo#713447, which was also due to other bugs that
have been fixed over time (in particular, the startup speedup work in
0.5) and better spinner management (bgo#713703).  It also corrects
a problem where detection of new mail while opening the folder let
to prefetching that mail, which was unnecessary because once the
folder is fully opened all unsynchronized mail is detected and pulled
down.
Assume UTC if no timzone spec'd in INTERNALDATE: Closes bgo#728647

Netcourrier.com issues INTERNALDATEs with no timezone/UTC offset
specified.
Make Geary compat. with mail.ru and netcourrier.com: Closes bgo#714902

imap.mail.ru and imap.netcourrier.com both do not parse this IMAP
request:

a001 FETCH 1 BODY[HEADER.FIELDS (FIELDS)]

The problem is the space between "HEADER.FIELDS" and "(FIELDS)", which
is valid IMAP.

This patch introduces detection of this problem and falls back to an
IMAP syntax where the space is removed.  Since other servers don't
recognize this syntax, it's important to detect this specific case and
use it.

Since multiple servers have reported this problem, this approach
rather than a list of hacks by domain name was adopted.  If this
detection algorithm has unintended side-effects, a domain-name listing
may be considered later.
Fix bug introduced in prior commit

Prior commit would retry FETCH command for *any* Error, which is
incorrect.  It should only retry when RETRY is thrown, otherwise it
should re-throw the Error.
Fix composed email Date: header: Closes bug #714376

GMime documentation suggests its date conversion methods take a
time zone offset in hours, but it appears the number must be base-100
to get the right results (i.e. -7 becomes "-0700").
Some date-related fixes
Merge branch 'master' into gtk-3.10