refactor(app): change the location of the navbar component

[royeeshemesh]

changed the location of the navbar component snippet to be only in the index.html file above ui-view / ng-view placeholder to load it only once and not in every route's html file.

[lirantal]

+1 for this performance improvement

[kingcody]

Thanks for the PR @flexpert, your changes LGTM. However, this branch needs to be rebased on canary before it can be merged. Also, while rebasing, would you mind updating the commit message to follow the contributing.md guidelines? Thanks again.

[Awk34]

I have made #1543 with updated code