Font Dialog Improvements

[paul-manias]

Desirable additions to the Font Dialog:

• An underline checkbox
• Fill selection for the font (could be a solid colour, gradient or pattern)
• A dialog option that allows the font list to be filtered on: Proportional; Fixed; Proportional and Fixed
• Support for choosing a stroke colour and stroke width
• Italics should be a checkbox, or if the SLNT axis is available, a slider
• Weight (boldness) should be expressed using a dedicated combobox as this is more intuitive for variable fonts
• Consider changing point size to a combobox list.