Fix #2030 - Clock can be off by a minute

[ZoneMR]

Set minute/second in our model based on the actual time from moment() rather than our own attempt to track the time - which can drift or fail to respond to time changes.

Also, schedule time refreshes to happen 50ms after the minute/second is expected to change - preventing premature fires and rapid re-firings of notifications due to accuracy limits in setTimeout

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[MagicMirrorBot]

	Warnings
⚠️	Please include an updated CHANGELOG.md file. This way we can keep track of all the contributions.

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