First check is it NodeSearchElement and then which key was pressed.
Comments added.
Bugs are fixed
Merge pull request #159 from vmoyseenko/DUI-LeftRightArrowCrashesDynamo

DUI: left right arrow crashes dynamo
Merge pull request #162 from vmoyseenko/DUI-NoActionsLblForSomeSP

StandardPanel with Queries only doesn't have a header