Provide API for row right click

[DamianOsipiuk]

I need to make a context menu on row right click.
Instead of writing a row wrapper - which i did currently, i would like to pass onRowRightClick or onRowContextMenu (to be consistent with element event) to the table and get the event callback.

Implementing this is quite straightforward as i saw in code and should not take much time - i could provide a PR.

[bvaughn]

I don't like continuing to add onRow* properties to Table. I wish I had designed that part of the API differently.

If you're willing to create a PR with all of the necessary code changes (to Table and defaultRowRenderer) and docs changes (Table.md), and it passes lint check, etc. I guess I'll merge it and it can go into the next release. 😄

I'm going to close this issue since I don't plan on taking action on it. But send a PR my way if you'd like!

[ryb73]

For anyone finding this from Google, this was implemented in #741, though it doesn't seem to have made it to the TypeScript defs