Fix thai symbol rendering slowness

Harfbuzz is constantly trying to load libthai in
src/3rdparty/harfbuzz/src/harfbuzz-thai.c,
making rendering of thai symbols very slow.

Task-number: QTBUG-37665
Change-Id: I30a2a5489271534eeacc205d8106b22130c40c5f
(cherry picked from qtbase/47e6ec0736aa129e181e0b6f02cec884f9832432)
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Fix string placeholders in two translations

As the translation in Qt 5 is more out of date this is being fixed
directly in the Qt 4.8 version as this is more accurate.

Change-Id: Ie7abbd224e26f8af63d80acd81ddf2973b39e0d4
Reviewed-by: Liang Qi <liang.qi@theqtcompany.com>
Remove the use of a template qUnused function for ICC

ICC 12 does not seem to need this.

Change-Id: I98e9d530e767c4d24424f0c2b5d763f863e85fe4
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
(backported from qt5/qtbase d3951a5b0f4fe9731d1512668b43f51bd98bd84e)
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>
Only add the res_file to the generated files if there is no rc_file

If both the rc_file and res_file was added to the project then in MSVC
2012 it would cause an error complaining of a duplicated resource.

Task-number: QTBUG-29826
Change-Id: Ib3401b423208cd8c90895038c9cbadd80c39b542
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
(cherry picked from qtbase/fa1fb5ed945650d45cf9b61906232cfbae11360e)
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Fix minor compiler warning

Change-Id: Ifb0e8c7998ca2b4cba9ce4a34655614d7cefb860
Reviewed-by: Robert Griebl <robert.griebl@pelagicore.com>
Auto-scroll while selecting entire rows/columns did not work

If you press and hold a section in a header view you can extend the
selection to more rows by moving the mouse. This worked fine until you
moved the mouse outside the geometry of the header view. The expected
behavior was then to scroll the view (this is what happens with extended
selections on regular table cells).

[ChangeLog][QtWidgets][QHeaderView] Auto-scroll the view when making
extended row/column selections.

Change-Id: Ic65aa34d370e74054b2123ab57edb1add0e8adb9
Task-number: QTBUG-21201
Reviewed-by: Thorbjørn Lund Martsum <tmartsum@gmail.com>
(cherry picked from qtbase/f9408317e70bc2e635a2f9baeff35d1c06227734)
Bump Qt version to 4.8.7

Change-Id: Icd6fcdb59eb1b9fd8de555ef1c1c87a379f06a27
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Rewrite debug output of event classes.

Bring debug formatting in Qt 4 on par with Qt 5.4:
- Introduce functions to return class name and type name by type.
- Add verbose output for DnD, tablet, native gestures and context
  menu, events.

Task-number: QTBUG-38858
Task-number: QTBUG-42344

[ChangeLog][QtGui][QEvent] The debug output for events has
been significantly improved.

Change-Id: I3f11e34c3c9d6a3c6db596be4051b801f00e6153
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
(cherry picked from qtbase/14f9c09542bd6cc19430473da9ce4c68f239ec7d)
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Windows: Fix return value of QDesktopServices::storageLocation(DataLocation).

Return empty string if SHGetSpecialFolderPath() fails for DataLocation, ie,
the directory does not exist.

Change-Id: I2abf41174b904fe36e587894832c0f3f4947dc1e
Task-number: QTBUG-43092
Reviewed-by: David Faure <david.faure@kdab.com>