Add missing trait descriptions for cursors and unify the language

OpenRA.Mods.Common/Traits/Armament.cs

@@ -76,9 +76,11 @@ namespace OpenRA.Mods.Common.Traits
 		// TODO: instead of having multiple Armaments and unique AttackBase,
 		// an actor should be able to have multiple AttackBases with
 		// a single corresponding Armament each
+		[Desc("Cursor to display when hovering over a valid target.")]
 		public readonly string Cursor = "attack";
 
 		// TODO: same as above
+		[Desc("Cursor to display when hovering over a valid target that is outside of range.")]
 		public readonly string OutsideRangeCursor = "attackoutsiderange";
 
 		public override object Create(ActorInitializer init) { return new Armament(init.Self, this); }