Check for conflict with bootstrap navbar because of z-index

[dasois]

We could maybe have the same problem:
voronianski/ngprogress-lite#18

[cetra3]

HI @dasois is this still required?

[anthwinter]

The z-index in ngprogress is already high in the default CSS, so I don't think this would be a problem. Also, users could also override the styling in their own codebase if required.

I will close this issue base on the above. Re-open if you think necessary.