Upgrade to MaterialDesignIcons 5.1.45

[EndlessDelirium]

This is an upgrade to Material Design Icons version 5.1.45. Due to #177 the font file has been edited so that the Glyphs are located in the PUA block (e.g. U+E000).

[EndlessDelirium]

This would resolve issues #168 and #169

[jdinnen]

When I was generating these for my own branch, I did this for each of the font entries, I would expect this would also work Icons.Add("mdi-ab-testing", '\U000F01C9');

Personally I have them as something like this in my own project as I have it as a dictionary of string string Icons.Add("mdi-ab-testing", "\U000F01C9");

Note i'm using font 5.6.55.