configfile: Allow getchoice() to take a list

If a list is passed to getchoice(), seamlessly convert it to a dict.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/display/hd44780_spi.py

@@ -9,7 +9,7 @@ import logging
 from .. import bus
 
 LINE_LENGTH_DEFAULT=20
-LINE_LENGTH_OPTIONS={16:16, 20:20}
+LINE_LENGTH_OPTIONS=[16, 20]
 
 TextGlyphs = { 'right_arrow': b'\x7e' }