Add PerfCake icon to new scenario wizard
Associate PerfCake icon to Design editor
Set background of composite transparent
Replace spinner with text
Fix launch.
Show user error response in console.
Show edit only on double click
Allow switch enabled by double click
Ask to save editor before launch scenario
Add jarsigner
Disable editing support in table viewers
* except enable/disable toggle
Do not keep messages directory in sync with scenario messages

* Only ask to create new message resource.
Do not store scenario IFile resource in wizard
* It is not needed since messages does not have to be kept in sync