Based on #9590 by @studiodyne

Fix #9092

Fix #9482

To reduce confusion over the current timer count vs. the compare (aka "top") value. Caution: this re-uses the function name, changing its meaning.

Fixes #8794

[2.0.x] Fix Power class

[2.0.x] Tronxy X5S

[2.0.x] Prevent watchdog reset due to many comments

[2.0.x] More reliable PROBING_HEATERS_OFF with BED_LIMIT_SWITCHING

Addressing #7449

Addressing #7400