Removed some un-used data

Currently a bug exists with label filtering...

Fixes issue with clipboard.js throwing an error

Currently a bug exists were moving into done does not remove from all

Fixed some bugs introduced when moving to es6

Only shows options to remove from all boards if issue is in more than 1

When moving to done & the issue belongs to more than 1 board it asks if user wants to remove from all the boards
Can filter issues by author, assignee & milestones