Extract text feedback messages.

OpenRA.Mods.Common/Traits/Player/BaseAttackNotifier.cs

@@ -31,6 +31,7 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Speech notification type to play.")]
 		public readonly string Notification = "BaseAttack";
 
+		[TranslationReference(optional: true)]
 		[Desc("Text notification to display.")]
 		public readonly string TextNotification = null;
 
@@ -39,6 +40,7 @@ namespace OpenRA.Mods.Common.Traits
 			"Won't play a notification to allies if this is null.")]
 		public readonly string AllyNotification = null;
 
+		[TranslationReference(optional: true)]
 		[Desc("Text notification to display to allies when under attack.")]
 		public readonly string AllyTextNotification = null;