mobile: fix editing tank information
mobile: disable download button if no connection is selected
mobile: fix incorrect time stamps on GPS track points created via location service
core: correctly recognize A1 as BLE dive computer
planner: Honor the "O2 narcotic" preference when computing MND
desktop: fix broken merging of dives with multiple cylinders
mobile: add information about the cloud sync state to the Subsurface plate in the menu

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