Switched to hiring a new applicant, instead of generating a new Kerbal
Attempted fix for auto-hire

Attempting to honor KSP's new 'don't autohire crew' feature.
Code cleanup, fixed toolbar visibility

Toolbar button should only be visible in editor or KSC.
Updated Starwaster's changes to new refactor + updates.
Fixed merge conflicts.
Merge pull request #1 from fingerboxes/master

Rebasing with Master