fix(clock): chrono rollover

[tracernz]

Fixes #4476

Summary of Changes

Fix the clock so that chrono rolls over from 99:59 to 00:00 as on the real unit.

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):

Testing instructions

Run the clock chrono with high simrate until over 99 minutes, then watch it roll over at 99:59 and continue from 00:00 (see video in #4476 for ref).

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