Allow to add spinner without bar

[preterer]

Hey,
I've noticed you can't actually add the spinner when bar is not included, so I provided a hotfix.

[jrobichaud]

I confirm your fix works.

Until this is merged, you can load a dummy loading bar instead:

    cfpLoadingBarProvider.includeBar = true;
    cfpLoadingBarProvider.loadingBarTemplate = "<div></div>";

The spinner starts to work.