Merge branch '3977' into 'master'

...ooling.base/src/org/fortiss/tooling/base/compose/.ratings

...tooling/base/compose/HierarchicElementCompositorBase.java

...tiss/tooling/base/compose/ModelElementCompositorBase.java

...kernel.ui/src/org/fortiss/tooling/kernel/ui/util/.ratings

...rc/org/fortiss/tooling/kernel/ui/util/CopyPasteUtils.java

org.fortiss.tooling.kernel/META-INF/MANIFEST.MF

org.fortiss.tooling.kernel/model/.ratings

org.fortiss.tooling.kernel/model/kernel.ecore

org.fortiss.tooling.kernel/model/kernel.genmodel

org.fortiss.tooling.kernel/plugin.xml