fixed gecko regExp for parding more complicated stack lines

[Poplava]

Issue #249

I got stack like this in Firefox:

.events["click [data-test]"]@http://example.com/user/views/UserView.js:23:17
jQuery.event.dispatch@http://example.com/vendor/jquery/jquery.js:4641:1
jQuery.event.add/elemData.handle@http://example.com/vendor/jquery/jquery.js:4309:1

But in Sentry I got only 2 lines:

jQuery.event.dispatch@http://example.com/vendor/jquery/jquery.js:4641:1
jQuery.event.add/elemData.handle@http://example.com/vendor/jquery/jquery.js:4309:1

This pull request fixes this issue.

[mattrobenolt]

Seems reasonable. Would really like some tests for these cases though.

[Poplava]

Sure. I'll write tests. I found all possible types of FF stack traces. It will be easy. mb I'll do on this weekend.

[mattrobenolt]

We also put together this, fwiw: https://github.com/defunctzombie/browser-stacks

[mattrobenolt]

What's the worst that can happen?