o.c.c.ioconfig.model: fix for IOC-39
o.c.c.ioconfig.view: fix for IOC-41 and IOC-42
o.c.c.ioconfig: minor refactorings and code cleanup
o.c.c.ioconfig.view: fix for IOC-40
Merge branch 'rel15x_beta' of https://github.com/Desy-extern/cs-studio into rel15x_beta