Cleanup/Optimize glyph shape of Latin Small Letter Script R (U+AB4B).

[jmcwilliams403]

This optimizes the stroke width of the bowl part of ꭌ and also treats the top-left "protrusion" of both letters as a permanent orthographic feature of the base letter, functioning more like a tooth (like in b) or like a descender (like in д/ґ) than like a serif as it was previously handled in #2679 . This is because it counterintuitively corresponds to the left bar of r in handwriting when going from left to right.

ч ꭋꭌ ъ

Sans Monospace Thin Upright:

Sans Monospace Regular Upright:

Sans Monospace Heavy Upright:

Sans Monospace Thin Italic:

Sans Monospace Regular Italic:

Sans Monospace Heavy Italic:

Slab Monospace Thin Upright:

Slab Monospace Regular Upright:

Slab Monospace Heavy Upright:

Slab Monospace Thin Italic:

Slab Monospace Regular Italic:

Slab Monospace Heavy Italic:

Aile Thin Upright:

Aile Regular Upright:

Aile Heavy Upright:

Aile Thin Italic:

Aile Regular Italic:

Aile Heavy Italic:

Etoile Thin Upright:

Etoile Regular Upright:

Etoile Heavy Upright:

Etoile Thin Italic:

Etoile Regular Italic:

Etoile Heavy Italic: