Implement limit for auto-upload retries

### Is your feature request related to a problem? Please describe.
This weekend I was off in the backcountry. I took several pictures. Despite being in airplane mode, my phone spent the rest of the day until I came back into service trying to auto-upload.

### Describe the solution you'd like
I think optimally the auto-upload should either stop trying after a certain amount of tries within a given timeframe, and/or see if it can even talk to the server before initiating an upload. I also had trouble with this issue when I was first configuring my server and it was intermittently available externally.

### Describe alternatives you've considered
Alternatively, the app should at least detect if the phone is in airplane mode and not attempt an upload.

Thanks, and I love the app!