Don't list trigger itself in "other trigger references" when a trigger references itself

Author: Rampastring

src/TSMapEditor/UI/Windows/TriggersWindow.cs

@@ -779,8 +779,15 @@ private void ShowReferences()
             }
 
             // Check other triggers to see whether this trigger is referenced by them
+            bool selfReference = false;
             var allReferringTriggers = map.Triggers.FindAll(trig =>
             {
+                if (trig == editedTrigger)
+                {
+                    selfReference = true;
+                    return false;
+                }
+
                 foreach (var triggerAction in trig.Actions)
                 {
                     if (!map.EditorConfig.TriggerEventTypes.ContainsKey(triggerAction.ActionIndex))
@@ -812,6 +819,13 @@ private void ShowReferences()
                 stringBuilder.Append(Environment.NewLine);
             }
 
+            if (selfReference)
+            {
+                stringBuilder.Append(Translate(this, "SelfReference", "The trigger is referenced by one or more of its own actions."));
+                stringBuilder.Append(Environment.NewLine);
+                stringBuilder.Append(Environment.NewLine);
+            }
+
             // Gather all triggers linked to this trigger
             List<Trigger> linkedTriggers = new List<Trigger>();
             var linked = editedTrigger.LinkedTrigger;