when click on a message in a popup, u'll directed to the causer control
unless another editor of this parameter is on the current active widget
which then selected instead of.
Merge branch 'sprint1' of
https://github.com/TestingTechnologies/PlayCustomParameters into sprint1

Conflicts:
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/editors/MacAddressEditor.java
reorganize package path for mac addr editor.
changes in one editor take effect in all other edditors of this
parameter.