default tiles URL is broken for Cordova / webviews / file:///

[jokeyrhyme]

Within a Cordova app, the protocol is "file:///".

So the protocol-relative URL pattern for use with tiles does not work:

• https://github.com/angular-ui/ui-leaflet/blob/master/src/services/leafletMapDefaults.js#L26

It might be best to whitelist HTTP and HTTPS, and fall back to HTTPS if the protocol is unrecognised.

Or, just default to HTTPS.

[vmusulainen]

Yes, I have faced this issue too