Merge branch 'stable' into dev

Change-Id: I4890e881fd9c9b7309168157279faec2011a212f
Update module version to 5.2.0

Change-Id: Iea133e4779c946aa144d4db3ccee2f0cdac9d3fa
Reviewed-by: David Faure (KDE) <faure@kde.org>
Upgrading libtiff: Adding clean copy of libtiff 4.0.3

This commit removes the previous version of the bundled libtiff
(3.9.2), as well as all local modifications to it. It adds an
unmodified copy of the official libtiff source distribution, except
that various extraneous files have been removed, as usual.

The patches required to build it in Qt will follow in separate
commit(s).

Task-number: QTBUG-25409
Change-Id: If47e02c25ce1a2b3b47eff94a875e2abea0c7e1c
Reviewed-by: aavit <eirik.aavitsland@digia.com>
Upgrading libtiff: Patches to libtiff 4.0.3 for Qt usage

This is the collection of those earlier patches to libtiff in Qt that
are still relevant, updated as required. For details, refer to the git
history of the src/3rdparty/libtiff directory of Qt 4 and Qt
5/qtimageformats.

All defines which happened in tiffconf.h were commented in tif_config.h.

Done-with: aavit <eirik.aavitsland@digia.com>
Task-number: QTBUG-25409
Change-Id: I8dc43f0dfe47e6472c3475d9e60ee304dc54ee3b
Reviewed-by: aavit <eirik.aavitsland@digia.com>
Merge remote-tracking branch 'origin/stable' into dev

Conflicts:
	.qmake.conf
	sync.profile

Change-Id: I8f788167e37c9b9ca3f4a59a9785a435eeaa6317
Merge remote-tracking branch 'origin/stable' into dev

Change-Id: I70792d10fb83d92b3b60e64b89c4dbf8144ccba5
Doc: Setting navigation variables

-for the navigation bar

Change-Id: If918610d2f80bf1bafffcef13851dc9f47aba8fd
Reviewed-by: Martin Smith <martin.smith@digia.com>
Merge branch 'stable' into dev

Conflicts:
	.qmake.conf

Change-Id: Ib841f2c7f6c0819ff9b41a11249331ca585d6d60
Merge remote-tracking branch 'origin/stable' into dev

The inline keyword needs to be defined to __inline
for MSVC when compiling C files.

The patch removing the redefinition of inline does not work
with the updated library, instead we resurrect the ifdef for
MSVC only.

Conflicts:
	src/3rdparty/libtiff/libtiff/tif_config.h

Change-Id: I22bbaf3627fdb4f3dc60c9cd0f8d3282efc5bd2c