create DfsTraverserIterable
remove FQ names of classes in openapi CellConditions
add delete action to CellModel_Empty
EditorCell -> openapi EditorCell in TypeEditorMessage
EditorCellEmpty is no more big
rebuild editors
create DeleteEmptyCell test
EditorCell -> openapi EditorCell in TypeEditorMessage
add delete action to EditorCellTable
fix tests
fix test
Merge remote-tracking branch 'remotes/origin/master' into simon

Conflicts:
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/actions/generated
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/editor/dependencies
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/editor/generated
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/findUsages/generated
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/intentions/generated
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/scripts/generated
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/textGen/generated
	languages/baseLanguage/baseLanguage/source_gen/jetbrains/mps/baseLanguage/editor/trace.info
	languages/languageDesign/editor/source_gen.caches/jetbrains/mps/lang/editor/generator/baseLanguage/template/main/generated
make
remove getRefNode() and setRefNode()
replace getSNodeWRTReference() by APICellAdapter.getSNodeWRTReference()
editorCell -> openapi EditorCell in MPSEditorDataKeys
rebuild actions which recieve EditorCell as a parameter
fix tests
remove usages of getCellRole() in EditorCell
Merge remote-tracking branch 'remotes/origin/master' into simon

Conflicts:
	languages/baseLanguage/baseLanguage/source_gen.caches/jetbrains/mps/baseLanguage/editor/generated
	languages/languageDesign/actions/source_gen.caches/jetbrains/mps/lang/actions/behavior/generated
	languages/languageDesign/editor/source_gen.caches/jetbrains/mps/lang/editor/generator/baseLanguage/template/main/generated
	languages/languageDesign/editor/source_gen.caches/jetbrains/mps/lang/editor/scripts/generated
	workbench/mps-editor/solution/actions.mps
	workbench/mps-editor/source_gen.caches/jetbrains/mps/ide/editor/actions/dependencies
	workbench/mps-editor/source_gen.caches/jetbrains/mps/ide/editor/actions/generated
	workbench/mps-editor/source_gen/jetbrains/mps/ide/editor/actions/trace.info