great progress on dive site handling

[Miika Turkia]

Well, seems that the recent changes prevent me from accessing the dive
site management. ("Log - Manage dive sites" does nothing for me.)

I also got incorrect GPS fix for a dive, but deleting the site
manually and re-syncing GPS fixed that. I have no idea how that
happened. Or could it be that the phone had not synced the sites and
last morning fix was used instead of the afternoon ones?

miika