Bug in enable continuous tracking

[mlibre2]

Hi, I just installed the app from the Play Store. I'm testing its features and I've noticed a small bug. If I enable continuous tracking and set location permissions only when it's active instead of all the time, the app displays a blank interface. This is fixed by granting real-time location permissions.

It seems to be somewhat related to #73

[tananaev]

Blank interface where? Screenshot?

[mlibre2]

@tananaev Yes, well, this time it gave me a black background with the same result, recreating the scene.