Allow resetting timer more than once without starting it

[JustScott]

Previously the timer only allows resetting the hour and minute values right when the app opens, and after the timer has ran once.

My fix just ignores whatever DisplayTime() would return, setting the minute and second value to 0 instead. There may be a better approach that someone could suggest below, otherwise this one works fine.

[github-actions]

Build size and comparison to main:

Section	Size	Difference
text	373040B	16B
data	948B	0B
bss	22536B	0B

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