Added Support for Touch devices for MapD Draw#29

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chinmaydalvi wants to merge 3 commits intoheavyai:masterfrom

chinmaydalvi:master

Commits on Jul 1, 2019

added support for touch devices
Chinmay Dalvi
committed

Commits on Jul 27, 2019

fixed the warning of in case of touch events
Chinmay Dalvi
committed
added support for double click on polygon shape to select the edges and change the size of edges
Chinmay Dalvi
committed