Add visual indicator when a fatal failure occurs

When a fatal failure occurs, a error indicator is added to the status bar, flashes red once, and then turns back to transparent background.

A modal dialog will open when the indicator is clicked, reporting the error, and providing a way to go to the error in the document.

The status bar indicator will go away as soon as Reporter.prototype.checkFatal returns false (no more fatal error).

The formatting and text can probably be worked on, but this is my initial commit for this subject.
Is their a better way to format this?

I've looked into querying jslinterrors.com API, but it seems to be either down, or I cannot figure out how to use it correctly for explanations (I wanted to inline the explanation if at all possible).