Added ability to delete hazards.
GUI is looking really messy. I will look into cleaning it up when it is
functional.
Added some sanity checking to prevent the adding of hazards if the
sprite sheet has no more options.
Stubbed out where I want to add edit functionality. No visible changes
yet.
Added ability to modify hazard properties. However, have a small issue
whereupon after modifying something and closing the window, if reopened
it will always show the list completely small and the view messed up. If
I save and restart, it is still like that.
Edit: Appears that marking something as 'Does not Explode' will cause
the GUI to mess up, although changing death animation is fine. Not sure
why this is.
Fixed issues where Hazard list would just collapse in GridBagLayout.
Things have been re-sized and it's a little better. Not pretty but at
least functional