Tycho updated to 0.20.0
Avoid repetitive messages for UI chaining attempt (fixes #625)
Async calls are not performed correctly when executed from sync block (fixes #624)
Fail in predefinedButtonTest removed by correct evaluation (#fixes 626)
Marked wizard construcotrs with WizardDialog as deprecated. Fixes #571.
REDDEER-238: Initial GEF RedDeer layer implemented