The drafts container was too skinny on mobiles, so the enforced
max-width of 60% should be ignored in favor of expanding to 90%
of the screen width.
This also fixes an issue where the content does not reach the bottom
of the container due to having too short of a height.
Fixes: #3867.
* Created a drafts modal to display/restore/delete drafts
* Created a Draft model to support storing draft data in localstorage
* Removed existing restore-draft functionality
* Added casper and node tests for drafts functionality
Fixes#1717.
Brock Whittaker
Steve Howell
Sampriti Panda
Cory Lynch