Feature Request: Warning on first move if not homed

I often switch my printer off with the head at y=max (200mm) as this make my bed easily accessible.
However if I forget this when I turn back on, and try and do a +ve step the bed crashes into the end.
Would it be possible to have a warning appear until after each axis had been homed.
My suggestion is warning color for the home buttons and a written warning over the appropriate axis
(NB z-axis has been homed in my example, so button is green and warning text has gone)

There is already a warning, also perhaps not obvious enough. Red coordinates mean coordinates are not correct, becaus ethey are not homed or went outside printable area.

I do not like the fat message you used - some users have no end stops, so that would be annoying. One other thing that could be done is using a different arrow color if unhomed. That should be obvious enough.

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