issue with Drafts modified time

[nikhilchowdary]

@opticod @croozeus

In drafts if we click a saved draft,then close the draft without modifying anything,even then the modified time of that draft gets updated .
Consider if we are searching for a draft.In this process If we open and close all drafts ,the time of every draft gets set to current time and we wont be able to figure out original modified time of any other draft.
I will fix this and send a PR asap

[opticod]

Ok. thanks.