Two minor bugs in New Issues redesign

[miketaylr]

STR:

1. pull latest master and start server
2. go to any random issue page

expected: issue page loads
actual: oops blank page and this error in the console:

ReferenceError: stateClass is not defined[Learn More]  lodash.custom.min.js%20line%2085%20%3E%20Function:1:61
	anonymous/< http://localhost:5000/js/vendor/lodash.custom.min.js%20line%2085%20%3E%20Function:1:61
	issues.StateButtonView<.render http://localhost:5000/js/lib/issues.js:316:19
	issues.StateButtonView<.initialize/< http://localhost:5000/js/lib/issues.js:301:7
	r http://localhost:5000/js/vendor/lodash.custom.min.js:26:149
	f http://localhost:5000/js/vendor/backbone-min.js:1:2280
	e.Events.trigger http://localhost:5000/js/vendor/backbone-min.js:1:1452
	.set http://localhost:5000/js/vendor/backbone-min.js:1:3904
	issues.Issue<.parse http://localhost:5000/js/lib/models/issue.js:71:5
	.fetch/t.success http://localhost:5000/js/vendor/backbone-min.js:1:4951
	m.Callbacks/j http://localhost:5000/js/vendor/jquery-1.11.2.min.js:2:27290
	m.Callbacks/k.fireWith http://localhost:5000/js/vendor/jquery-1.11.2.min.js:2:28108
	x http://localhost:5000/js/vendor/jquery-1.11.2.min.js:4:22059
	.send/b http://localhost:5000/js/vendor/jquery-1.11.2.min.js:4:25980

[miketaylr]

Oddly enough, this isn't reproducing for me. Possibly we got into a weird state on bad conference wifi, with some GitHub requests not resolving. That said, I'm going to convert this issue to fix two small bugs I discovered while testing.

[miketaylr]

Bug 1) Use stateNeedsTriage, not the old stateNew
Bug 2) the label editor has a z-index problem which means you open the file picker, rather than selecting a label that is low enough.

Probably should be 2 different issues, but they're trivial fixes and I'm lazy.

[miketaylr]

r=me