Merge remote-tracking branch 'origin/5.12.5' into 5.12

Change-Id: I4bff23ec94b76de300328a5235a35bd3e2f5da2c

dist/changes-5.12.5

+Qt 5.12.5 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.12.0 through 5.12.4.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+https://doc.qt.io/qt-5/index.html
+
+The Qt version 5.12 series is binary compatible with the 5.11.x series.
+Applications compiled for 5.11 will continue to run with 5.12.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+****************************************************************************
+*                              Qt 5.12.5 Changes                           *
+****************************************************************************
+
+General
+-------
+
+  - [QTBUG-62106] Fixed possible crash after rapid tapping.
+  - [QTBUG-75884] Fixed crash on setHttpUserAgent.
+  - [QTBUG-76249] Fixed user-agent on some new windows.
+  - [QTBUG-76268] Fixed tab key send on minimize.
+  - [QTBUG-76347] Fixed duplicate events being send from tablets.
+  - [QTBUG-76828] Clear shared context on exit.
+  - [QTBUG-76958] Fixed possible crash when loading in background.
+
+Chromium
+--------
+
+ - Security fixes from Chromium up to version 76.0.3809.87, including:
+
+    - CVE-2019-5829
+    - CVE-2019-5831
+    - CVE-2019-5832
+    - CVE-2019-5837
+    - CVE-2019-5839
+    - CVE-2019-5842
+    - CVE-2019-5851
+    - CVE-2019-5852
+    - CVE-2019-5854
+    - CVE-2019-5855
+    - CVE-2019-5856
+    - CVE-2019-5857
+    - CVE-2019-5860
+    - CVE-2019-5861
+    - CVE-2019-5862
+    - CVE-2019-5865
+    - Critical security issue 977057
+    - Security bug 934161
+    - Security bug 939644
+    - Security bug 948172
+    - Security bug 948228
+    - Security bug 948944
+    - Security bug 950005
+    - Security bug 952849
+    - Security bug 956625
+    - Security bug 958457
+    - Security bug 958689
+    - Security bug 959193
+    - Security bug 959518
+    - Security bug 958717
+    - Security bug 960785
+    - Security bug 961674
+    - Security bug 961597
+    - Security bug 962083
+    - Security bug 964002
+    - Security bug 973893
+    - Security bug 974627
+    - Security bug 976050
+    - Security bug 981602
+    - Security bug 983850
+    - Security bug 983938