Nyall Dawson 0ab761c210 Add proper method to determine whether a symbol uses map unit sizes,
and use this to determine whether a legend item needs updating
as a result of a map change

This results in a HUGE speed up when loading large projects where
symbols don't use Millimeter based sizes, as the previous code
assumed only that any non-millimeter size was a map unit based size.
2020-12-10 04:04:17 +10:00
..
2020-11-10 15:11:48 +01:00
2020-11-12 07:14:46 +10:00
2020-11-12 07:14:46 +10:00
2020-11-12 07:14:46 +10:00
2020-11-28 05:24:54 +10:00
2020-11-12 07:14:46 +10:00
2020-11-12 07:14:46 +10:00
2020-11-12 07:14:46 +10:00