Fixing some behaviors when there's no context menu on cytoscape background.#71

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witoreel wants to merge 2 commits intoiVis-at-Bilkent:masterfrom witoreel:master

+3-2

Commits on Aug 16, 2022

Fixing a problem where an exception is throwed when show context menu in cytoscape background. In this case, target variable is cytoscape itself, and it does not have the method is().
Witor Corrêa
committed
Case: edge context menu with an item, background context menu empty.
Witor Corrêa
committed