added array editor with table layout
added polymorphic list in table layout
moved errorCount to odelHandle
moved errorCount to modelHandle
fixed GroupPanelWidget
cleaned up
modelHandle can be null in DecoratorWidget
Merge remote-tracking branch 'origin/feature/array_editor'

Conflicts:
	tests/meta/kitchensink.json
added tests for table list
fixed table list and added decorators
fixed display of errors in tabs
added test for simple table list
added test to module