Pyglet 2.1 issues #2278

Notes from #2226

To resolve:

• (Upstream) Whatever's going with Screen types and pyglet's import trickery
• (Upstream) Resolve upstream Python font issues:
  • split bold into string weight + bold (ty to Ben!)
  • investigate obliqueness values + split if necessary (investigated with @DigiDuncan, no nice way so deferred til after 2.1)

Moving to 3.1+

• Verify that the workaround for pyglet font loading changes works
• Look for ways to simplify and/or make our Text more durable
• The GUI stack & event handlers?