Merge branch 'revert-3fa3272a' into 'master'

Revert "- QOpenGL Widget exchange"

See merge request !287
12 jobs for master in 113 minutes and 19 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #31444
Linux
Doc-publish

00:10:48

passed #31443
Apple
Mac-Cpp11

00:38:06

passed #31442
Qt551 VS2013
VS2013-Qt-5.5.1-x64

00:21:34

passed #31439
Qt56 VS2015
VS2015-Qt-5.6.2-x32

00:23:58

passed #31438
Qt56 VS2015
VS2015-Qt-5.6.2-x64

00:24:44

passed #31441
VS2015
VS2015-Qt-5.9.0-x32

00:27:43

passed #31440
VS2015
VS2015-Qt-5.9.0-x64

00:27:52

passed #31435
MultiThreads Linux
clang-c++11-Qt5

00:08:16

passed #31436
MultiThreads Linux
clang-c++11-Qt5.9.0

00:15:24

passed #31437
MultiThreads Linux
cppcheck

00:03:50

passed #31433
Linux
gcc-c++11-Qt5

00:04:03

passed #31434
Linux
gcc-c++11-Qt5.9.0

00:03:36