Implementation of basic context menu#258

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meshalawy wants to merge 7 commits intoquantopian:masterfrom

meshalawy:implement_context_menu

Commits on Jun 29, 2019

Commits on Jun 30, 2019

Commits on Jul 3, 2019

Change context menu items to key-value
meshalawy
committed

Commits on Jul 4, 2019

Use index & column instead of cell
meshalawy
committed