move legacy map import into the command line utility

closes #4368
selectable maps by default
automatically fix open areas

and don't hard-code the tiles no more
default to filename instead of "(null)" when the map has no name
more verbose output on ignored player reference values
Merge pull request #4394 from Mailaender/legacy-map-import

Moved the LegacyMapImport into Utility
remove left-overs from initial spice render experiments
simpler category description for rotten base
keep all but one randomized sand tile

render tiles that should be replaced black
add missing dash
stick to one randomized rock tile
workaround Warning: Unknown or excluded actor: spicebloom
workaround Tileset ARRAKIS lacks terraintype Clear
mark legacy tiles as black in minimap
fixed and randomized the rock and sand tiles on all maps
English please
add missing dash and avoid brackets
update CHANGELOG