Swipable navigation menu on mobile

[prateekbh]

This adds the capability for the navigation menu to open and close by swiping in either direction.

This also takes care that a diagonal swipe should result in only one of the two things
wither horizontal navigation close/open or vertical scroll.

[jsf-clabot]

All committers have signed the CLA.

[skipjack]

Tested this out, looks good thank you! I would just ask that you continue to follow BEM for the new elements you added and sign the CLA. Once that's done this should be good to go.

[prateekbh]

@skipjack the opener element right?
I guess sidebar-content should do good.

[skipjack]

@prateekbh it would be both. Basically, with BEM and react, each component is a "block" (in this case sidebar-mobile) and every other element is classed within that block so it has to be sidebar-mobile__***. Especially in this case where we have another Sidebar component thus making the sidebar-content somewhat confusing.

[skipjack]

Hey @prateekbh, hope you don't mind I pushed the fixes to your fork. Would you mind signing the CLA? Once that's done that I can merge 👍

[prateekbh]

Hey @skipjack, done :)
Thanks for fixing the stuff

[prateekbh]

Also please let me know when will it be deployed?

[skipjack]

Closing and re-opening with some last fixes and resolving of merge conflicts. @prateekbh thank you, I'll be merging the updated PR momentarily.

I don't do the deployments, but I suspect you'll see a PR called "Deploy" or "Publish" pop up this week -- once that's merged you should see the live site updated with these changes and others.