Allow capturing activities longer than 99:59:59
For long events such as single stage 200 mile or further trail running races (e.g. Tor des Géants, Moab240, etc) it will be useful to be able to capture durations longer than 99:59:59 because many athletes will require more than 100 hours to complete the activity.

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NoNeed ToBeReal commented
Currently activity time is limited to 99:59:59 (hh:mm:ss) - having recently completed the Winter Spine Race in the UK and being entirely unable to keep up with John Kelly the current limit leaves me short some 50 odd hours. Please extend the limit on activity time to (999:59:59) to allow slow coaches like myself to accurately log ultra races.