Jun Pataleta ec90b342da
MDL-74810 core: get_time_interval_string() improvements
* Add parameter to drop zero time units. So a time interval like
  "3d 0h 0s" will be returned as "3d" only.
* Add parameter to display full format for time units. E.g. Instead of
  "3d 2h", it will be returned as "3 days 2 hours"
* Deprecate unused dateintervaldayshoursmins langconfig string.
2023-08-28 16:40:36 +08:00
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