Also a rationalization of text polygon generators, with the "standard"
version inherited from BOARD_ITEM now giving the bounding box. This
requires callers who want the (much) more expensive stroke-based one
to call it explicitly (and brings PCB_TEXT in line with the was FP_TEXT
already was.
Fixes https://gitlab.com/kicad/code/kicad/issues/6525
The new shape architecture gives us the opportunity to make text
selection much more intuitive by actually looking at the glyph
shapes. Before text would be selected when you clicked in the
descenders area (which was usually blank given uppercase letters
and digits).
Fixes https://gitlab.com/kicad/code/kicad/issues/6525
