o.c.graphene: better separation for memento handling and cleanup
o.c.u.pvmanager.graphene: graph expression exposes the data
o.c.graphene.opiwidgets: fix line graph icon
o.c.graphene: baby steps to fix context menus properly
o.c.u.pvmanager.widgets: adding icons for formula
o.c.u.pvmanager.widgets: adding icons for value
o.c.graphene: adding vtype adapter factory
o.c.graphene: adding pop-up menu for vtype values
o.c.graphene: adding data export through clipboard
o.c.graphene: changed position of pop-up menu.
Merge branch '3.2.x' of git@github.com:ControlSystemStudio/cs-studio.git into 3.2.x