DisplayProgressBar: min_value ignored in fill width calculation

[matthewgjohnson]

The DisplayProgressBar method in lcd_comm.py calculates the filled width using the raw value rather than the value's offset from min_value:

# Current (line 359)
bar_filled_width = (value / (max_value - min_value) * width) - 1

# Should be
bar_filled_width = ((value - min_value) / (max_value - min_value) * width) - 1

When min_value is 0 (the default), this has no effect — which is why it's gone unnoticed. But for any bar with a non-zero minimum (e.g. a temperature bar with min=25, max=95), the fill is wrong:

value	min	max	buggy fill	correct fill
25	25	95	36%	0%
60	25	95	86%	50%
95	25	95	136% (clamped)	100%

DisplayRadialProgressBar already does this correctly on line 560:

pct = (value - min_value) / (max_value - min_value)

Happy to submit a one-line PR if you'd like.