for openSUSE Tumbleweed, Qt 5.7 has been requested and submitted

This newly is based on GTK3 plugins, no longer on GTK2, which in turn makes
installation-images require adaption in order to pass build

The current build log ends with:

>[  730s] resolving package dependencies...
>[  730s] mk_image: package libyui-qt-graph7-2.44.5-3.17.x86_64 requires libQt5Gui.so.5()(64bit), but none of the providers can be installed
>[  730s] mk_image: package libQt5Gui5-5.7.0-267.1.x86_64 requires libgdk-3.so.0()(64bit), but none of the providers can be installed
>[  730s] mk_image: nothing provides adwaita-icon-theme needed by libgtk-3-0-3.22.0-4.1.x86_64
>[  730s] mk_image: package libyui-qt-pkg7-2.45.6-3.19.x86_64 requires libQt5Gui.so.5()(64bit), but none of the providers can be installed
>[  730s] mk_image: package libQt5Gui5-5.7.0-267.1.x86_64 requires libgdk-3.so.0()(64bit), but none of the providers can be installed
>[  730s] mk_image: nothing provides adwaita-icon-theme needed by libgtk-3-0-3.22.0-4.1.x86_64
>[  730s]  in data/root/root.file_list line 734.
>[  730s] make: *** [Makefile:156: root] Error 25