greyed-out blocks in palette when they are not available in current model, but present in currently selected kit
Merge branch 'trikSupportStage2' of https://github.com/qreal/qreal into trikSupportStage2

Conflicts:
	plugins/robots/interpreters/trikKitInterpreter/src/robotModel/real/realRobotModelV4.cpp
	plugins/robots/interpreters/trikKitInterpreter/src/robotModel/real/realRobotModelV4.h
	plugins/robots/interpreters/trikKitInterpreter/src/trikKitInterpreterPlugin.cpp