Revision control

++ Qt 5.11 introduces many new features and improvements as well as bugfixes
++ over the 5.10.x series. For more details, refer to the online documentation
++ included in this distribution. The documentation is also available online:
++
++
++ The Qt version 5.11 series is binary compatible with the 5.10.x series.
++ Applications compiled for 5.10 will continue to run with 5.11.
++
++ Some of the changes listed in this file include issue tracking numbers
++ corresponding to tasks in the Qt Bug Tracker:
++
++
++ Each of these identifiers can be entered in the bug tracker to obtain more
++ information about a particular change.
++
++ ****************************************************************************
++ * Qt 5.11.0 Changes *
++ ****************************************************************************
++
++ WebView
++ -------
++
++ - [QTBUG-63137] QtWebView will now load its backends at run-time.
++ - [QTBUG-66927] Fixed visibility updates for when the scene, containing the
++ WebView, is inside a widget application.
++
++ ****************************************************************************
++ * Platform-specific Changes *
++ ****************************************************************************
++
++ macOS & iOS
++ -----------
++
++ - [QTBUG-67293] Links with target="_blank" will now be handled by forwarding
++ the request to the system.
++ - Added error handler for "didFailNavigation", to properly handle errors
++ occurring during navigation.