Add Orbit repository
Show properties in sender

* it includes generalizating PropertyListEditPolicy to use
* IPropertyContainer as a model.
Do not use field editors in preferences

* Field editors are simpler but it does not allow easily to rearrange
* them into table.
Use Prefernce key for gaining color using colorUtils

* In previous implementation ColorUtils selected color based and
* editPart which called getColor. But it is not apropriate since same
* edtiParts can sometimes request other color. (e. g. Property in sender
* and property in properties section)
Add different color for property edit part

* Color now depends also on parent edit part
Change visible labels

CreateMessage -> message
Validation section -> validation
Edit invokes only one wizard even if more components are selected.
Cache and dispose colors
Enable launch perfcake using toolbar button
Fix next button in new scenario wizard
Fix column size and alignment in table viewers
Fix ReporterAddWizard to add destinations to model.
Ask before delting validator
Warn user if he deletes validator which causes edit messages