wot maps update (1.19)

[synopss]

It would be interesting to cleanup a bit the mess which I didn't do to avoid breaking wottactics.

This would be interesting to do :

To rename:

alaska.jpg => klondike.jpg
arctic_attac_defence.jpg => mannerheim_line_attac_defence.jpg
arctic_region.jpg => mannerheim_line.jpg
cliffs.jpg => cliff.jpg
phrokorovka.jpg => prokhorovka.jpg
phrokorovka_attac_defence.jpg => prokhorovka_attac_defence.jpg
phrokorovka_encounter.jpg => prokhorovka_encounter.jpg
sweden.jpg => glacier.jpg

To remove:

cliff_attack_defence.jpg
dragon_ridge.jpg
erlenberg_encounter.jpg
fiery_salient.jpg
fiery_salient_encounter.jpg
hidden_village.jpg
highwall.jpg
highwall_confrontation.jpg
kharkov_attac_defence.jpg
komarin.jpg
malinovka_assault.jpg
mittengard.jpg
moon_pool.jpg
nebelburg_halloween.jpg
northwest.jpg
pacific_Island.jpg
port.jpg
ruinberg_on_fire.jpg
ruinberg_on_fire_encounter.jpg
sacred_valley.jpg
sacred_valley_encounter.jpg
sand_river_assault.jpg
severogorsk.jpg
severogorsk_assault.jpg
swamp.jpg
tundra_assault.jpg
tundra_encounter.jpg
westfield_assault.jpg
windstorm.jpg
windstorm_assault.jpg
winter_himmelsdorf.jpg
winter_himmelsdorf_assault.jpg
winter_himmelsdorf_attac_defence.jpg
winter_himmelsdorf_encounter.jpg
winter_ruinberg.jpg
winter_ruinberg_attac_defence.jpg
winter_ruinberg_encounter.jpg