Merge branch 'doxygen' into 'master'

FIxed an open group

See merge request !180
6 jobs for master in 76 minutes and 4 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed clang-c++11-Qt5 #14180
Linux MultiThreads

00:08:56

passed cppcheck #14181
Linux MultiThreads

00:35:23

passed gcc-c++11-Qt5 #14179
Linux

00:03:30

passed VS2013-Qt-5.5.1-x64 #14184
VS2013 Qt551

00:19:37

passed VS2015-Qt-5.6.0-x32 #14183
VS2015 Qt56

00:23:26

passed VS2015-Qt-5.6.0-x64 #14182
VS2015 Qt56

00:17:36