Modified dropdown to use Unity label window.

[RotaryHeart]

This allows for easier search for the fonts with the provided autocomplete logic.

[5argon]

I have significantly changed the code to fix the following problems

• Changing scene resets the font
• Overridden fields are not bold
• Editor lag
• Added padding option
• There is a selector for the 2nd bold font for use with the overridden fields

So if possible please modify the dropdown again. Now there're 2 of them. Thank you.

[RotaryHeart]

Ok, it should be updated now