Merge remote-tracking branch 'origin/master'

.gitlab-ci.yml

plugins/itemimage/itemimage.cpp

plugins/itemsync/CMakeLists.txt

plugins/itemsync/itemsync.cpp

src/common/common.cpp

src/common/common.h

src/gui/configurationmanager.cpp

src/gui/mainwindow.cpp

src/tests/test_utils.h

src/tests/tests.cpp