Added values normalization in RangeToSweepConverter

[CrackAndDie]

Added values normalization so the correct angles would be applied to circular progress bars.
Issue:
The progress bar would be filled 100%:

<ProgressBar Classes="circular no-transitions" 
         Minimum="5"
         Maximum="14"
         Value="9"/>

but this one will be filled a bit less than a half:

<ProgressBar Classes="no-transitions" 
         Minimum="5"
         Maximum="14"
         Value="9"/>

Problem location:
The problem is in

Material.Avalonia/Material.Styles/Converters/RangeToSweepConverter.cs

Lines 31 to 32 in 04039cd

	var m = max - min;
	return val / m * 360;

Fix:
Changed angle calculation.

[c3n9]

lgtm

[SKProCH]

Thanks!