o.c.graphene: udpating icons
o.c.ui.util: adding PopupMenuUtil
o.c.ui.util: adding gear icon
o.c.graphene: using PopupMenuUtil from o.c.ui.util
o.c.graphene: using gear icon from o.c.ui.util
o.c.ui.util: moving AbstractSelectionProvideWrapper to ui.util
o.c.studio: using AbstractSelectionProviderWrapper from ui.util
o.c.graphene: removing channel.widgets dependency
Merge branch '3.2.x' of git@github.com:ControlSystemStudio/cs-studio.git into 3.2.x