new known issue with drawings

Dependencies

• [2] 5ED3YGHW planning out cursor up/down over wrapped lines
• [*] FS2ITYYH record a known issue
• [*] A2TQYJ6J .
• [*] 242L3OQX bugfix: ensure Cursor_line is always on a text line

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  + * Insufficient handling of constraints when moving points. For example, if you

  + draw a manhattan line and then move one of the points, you may not be able

  + to hover on it anymore.

  +

  + There's two broad ways to fix this. The first is to relax constraints,

  + switch the manhattan line to not be manhattan. The second is to try to

  + maintain constraints. Either constrain the point to only move along one line

  + (but what if it's connected to two manhattan lines?!), or constrain the

  + other end of the line to move alongside. I'm not sure yet which would be

  + more useful. Getting into constraints would also make the program more

  + complex.

  +

  + Bottomline: at the moment moving points connected to manhattan lines,

  + rectangles or squares can break drawings in subtle ways.