org.epics.vtype: utility to check display limit validity.
o.c.u.pvmanager: fixed channel lookup during disconnect.
o.c.u.pvmanager.loc: improved behavior.
loc channels keep values after disconnect and last initialization wins.
o.c.d.pvmanager.probe: checks whether display is valid.
Merge branch 'master' of git@github.com:ControlSystemStudio/cs-studio.git