Qt 5.9 introduces many new features and improvements as well as bugfixes
over the 5.8.x series. For more details, refer to the online documentation
included in this distribution. The documentation is also available online:

http://doc.qt.io/qt-5/index.html

The Qt version 5.9 series is binary compatible with the 5.8.x series.
Applications compiled for 5.8 will continue to run with 5.9.

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.

****************************************************************************
*                   Important Behavior Changes                             *
****************************************************************************

 - Enabled QML caching.
 - Removed the WinRT style.

****************************************************************************
*                          Controls                                        *
****************************************************************************

 - Button:
   * [QTBUG-57853] Fixed to accept space key press and release events to
     avoid leaking/propagating them to the parent item.

 - GroupBox:
   * Removed a hard-coded texture size from the Desktop style to avoid
     skewed groupboxes in Plasma's config dialogs when using larger fonts.

 - MenuBar:
   * [QTBUG-59335] Fixed styling of disabled entries.

 - ScrollView:
   * Added a maximum scroll bar size limit to avoid scroll bars overflowing
     the container when e.g. contentWidth/height becomes zero.
   * [QTBUG-59633] Fixed jumps to the top with mouse wheel events.

 - Slider:
   * [QTBUG-42273] Prevented wheel events from escaping.

****************************************************************************
*                          Dialogs                                         *
****************************************************************************

 - FileDialog:
   * Fixed to remember the folder only when the dialog is accepted.

****************************************************************************
*                          Extras                                          *
****************************************************************************

 - TumblerStyle:
   * [QTBUG-55289] Deprecated unused spacing property.
