Generalized the tune combinators to make it applicable to editors too

Libraries/iTasks.dcl

Libraries/iTasks/Engine.icl

Libraries/iTasks/Internal/Tonic.dcl

Libraries/iTasks/UI/Editor.dcl

Libraries/iTasks/UI/Editor/Modifiers.dcl

Libraries/iTasks/UI/Editor/Modifiers.icl

Libraries/iTasks/UI/Layout/Common.dcl

Libraries/iTasks/UI/Layout/Common.icl

Libraries/iTasks/UI/Tune.dcl

Libraries/iTasks/UI/Tune.icl

Libraries/iTasks/WF/Combinators/Common.dcl

Libraries/iTasks/WF/Combinators/Common.icl

Libraries/iTasks/WF/Combinators/Tune.dcl

Libraries/iTasks/WF/Combinators/Tune.icl