fix table context menu/drag-select
fix table context menu/drag-select

Summary:
As seen [here](https://fb.workplace.com/groups/230455004101832/permalink/623364598144202/?comment_id=623436418137020&comment_tracking=%7B%22tn%22%3A%22R%22%7D) using the primary key + CTRL to open the context menu, triggers the drag-select mode. This should not be the case. This diff changes the behaviour to:

- Not trigger the drag-select-mode, when openting the context menu using CTRL
- Select the current row, when performing a context click on it.

Reviewed By: jknoxville

Differential Revision: D15538057

fbshipit-source-id: d3d086c3d44618b2801e3a9b0646689c04fa32ff

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper