Add cartouche sprites, fix and improve a block of wall sprites (#3131)

* Rework wall tiles

Reworked a section of misaligned wall tiles and generally improved their appearance and consistency.

* Update items.atlas

Adding cartouches

* Update items.png

Adding cartouches

forge-gui/res/adventure/Shandalar/sprites/items.atlas

@@ -450,3 +450,19 @@ Conjurer's Mantle
 ZedruuLantern
   xy: 336, 128
   size: 16, 16
+CartoucheOfSolidarity
+  xy:320,176
+  size:16,16
+CartoucheOfKnowledge
+  xy:320,192
+  size:16,16
+CartoucheOfStrength
+  xy:320,208
+  size:16,16
+CartoucheOfAmbition
+  xy:320,224
+  size:16,16
+CartoucheOfZeal
+  xy:320,240
+  size:16,16
+