Oops, a zero retry_interval check had gone missing in scheduling reorganisation.

Added exeption protection decorators to callbacks.

Various tray menu fixes

Added some debug log messages

Missing notify in scheduler sleep/wake callback

Changed scheduler busylooping method, and decreased precision to 5 minutes:

Part 2 of handling macOS sleep/wake signal brokenness.

macOS "sleep" signals / status are complete bollocks:

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mercurial