Add changes file for 4.9.2

Change-Id: Icce93b9daed51603093cf1efe8c904253984351b
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

dist/changes-4.9.2.md

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+# Qt Creator 4.9.2
+
+Qt Creator version 4.9.2 contains bug fixes.
+
+The most important changes are listed in this document. For a complete
+list of changes, see the Git log for the Qt Creator sources that
+you can check out from the public Git repository. For example:
+
+    git clone git://code.qt.io/qt-creator/qt-creator.git
+    git log --cherry-pick --pretty=oneline origin/v4.9.1..v4.9.2
+
+## General
+
+* Fixed display of shortcuts in `Keyboard` preferences (QTCREATORBUG-22333)
+
+## Editing
+
+* Fixed disabled editor close button in Design mode (QTCREATORBUG-22553)
+
+### Syntax Highlighting
+
+* Fixed highlighting issue while editing (QTCREATORBUG-22290)
+
+## All Projects
+
+* Fixed saving state of `Hide Empty Directories`
+* Fixed crash that could happen after project parsing failed
+
+## C++ Support
+
+* Fixed expansion of `%DATE%` in license templates (QTCREATORBUG-22440)
+
+## Qt Quick Designer
+
+* Fixed crash on malformed QML (QDS-778)
+
+## Platform Specific
+
+### macOS
+
+* Re-enabled graphics card switching that was disabled as a workaround
+  for OpenGL issues on macOS 10.14.4 (QTCREATORBUG-22215)
+
+## Credits for these changes go to:
+
+Christian Kandeler  
+Christian Stenger  
+David Schulz  
+Eike Ziller  
+Leena Miettinen  
+Michl Voznesensky  
+Robert Löhning  
+Thomas Hartmann  
+Tim Jenssen  
+Tobias Hunger  
+Ulf Hermann