Add chatty-clock and use it to update time in regular intervals

Fixes #627 (closed)

/cc @guido.gunther @sam.hewitt

@sam.hewitt If you are interested, you could see all possible cases in: mohammed.sadiq/chatty@0492205c

the first commit lacks any motivation what chatty clock is, why it's a good idea and what it will be used for - I didn't look further.

I'm curious what these values where it is 17 minutes past the hour are about, are these hardcoded values, or?

added 9 commits

• 8e7b92ec - Add chatty-clock
• 79807ffc - message-row: Use chatty-clock to get human time
• 2a75ca1f - list-row: Use chatty-clock to get human time
• 8969ff9a - utils: Remove no longer used function
• 4faae0ed - list-row: Remove SECONDS_PER_HOUR macro
• f0fc8ccf - clock: Add some macros
• 26cefcb7 - message-row: Hook to chatty-clock to update time
• 2ecb2cd9 - list-row: Hook to chatty-clock signal to update time
• 72f7cc1d - application: Toggle clock on focus changes

Compare with previous version

resolved all threads

resolved all threads

added 53 commits

• 72f7cc1d...04bd5ccd - 44 commits from branch Librem5:master
• 273c9869 - Add chatty-clock
• a4ee8d99 - message-row: Use chatty-clock to get human time
• 4960b246 - list-row: Use chatty-clock to get human time
• 36696c5b - utils: Remove no longer used function
• 779840f1 - list-row: Remove SECONDS_PER_HOUR macro
• 9e71f641 - clock: Add some macros
• 06fd17fa - message-row: Hook to chatty-clock to update time
• 16d99030 - list-row: Hook to chatty-clock signal to update time
• 693c890d - application: Toggle clock on focus changes

Compare with previous version

added 34 commits

• 693c890d...036aebe3 - 25 commits from branch Librem5:master
• 57eaae71 - Add chatty-clock
• 76afb082 - message-row: Use chatty-clock to get human time
• 891a3629 - list-row: Use chatty-clock to get human time
• 55583af3 - utils: Remove no longer used function
• 5fbb9317 - list-row: Remove SECONDS_PER_HOUR macro
• 5dfb587c - clock: Add some macros
• 71b43f82 - message-row: Hook to chatty-clock to update time
• ebc6f7fa - list-row: Hook to chatty-clock signal to update time
• 83407b79 - application: Toggle clock on focus changes

Compare with previous version

added 29 commits

• 83407b79...57cef247 - 20 commits from branch Librem5:master
• 92de360b - Add chatty-clock
• b0998015 - message-row: Use chatty-clock to get human time
• 6047e7fc - list-row: Use chatty-clock to get human time
• 044d13ce - utils: Remove no longer used function
• 2b86a0d4 - list-row: Remove SECONDS_PER_HOUR macro
• ced9fea6 - clock: Add some macros
• 5324bb6c - message-row: Hook to chatty-clock to update time
• 17351e27 - list-row: Hook to chatty-clock signal to update time
• 81e1098e - application: Toggle clock on focus changes

Compare with previous version

merged

merged. Any bugs appearing shall be fixed as found.