Fix ttf path by removing '?'. Resolves webpack issue.

[mtraynham]

This fixes #4113. Simple change.

[JLLeitschuh]

Can you ensure that this doesn't break on some browser?
http://www.paulirish.com/2009/bulletproof-font-face-implementation-syntax/
My css isn't strong enough to just accept this. I don't know why that ? is there and if needs to be there for some particular browser.

[mtraynham]

Seems the initial commit had it:
ce33097#diff-46456a3b2c603089887395d6c827b689R6

It's just a path reference. Usually you would have query parameters after the ? to cache bust, like so: url('ui-grid.ttf?v=20'), but with nothing afterwards it's pointless to have.

[mtraynham]

By the way, I'm actually able to resolve this with webpack (no change required for angular-ui-grid), but it was a slight hiccup and felt the question mark is unnecessary...

[JLLeitschuh]

I'll trust it. I asked some other people with more CSS skills than my own and they approve.

[mtraynham]

thanks! 😄