multiple changes:
- changes of widget layout
- extend IMessageView interface
- decapsulate verification process in editor
Merge branch 'sprint1' of
https://github.com/TestingTechnologies/PlayCustomParameters into sprint1

Conflicts:
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/IPv6ConfigurationComposer.java
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/editors/MacAddressEditor.java