Fixed Validation Tooltip that never shows up.

I was having an issue where the canShow variable always ends up false.
This change should fix the problem and not interfere in the current logical flow.

src/MahApps.Metro/Controls/CustomValidationPopup.cs

@@ -153,7 +153,6 @@ private void CustomValidationPopup_Loaded(object sender, RoutedEventArgs e)
             this.metroContentControl = adornedElement.TryFindParent<MetroContentControl>();
             if (this.metroContentControl != null)
             {
-                canShow = !this.metroContentControl.TransitionsEnabled;
                 this.metroContentControl.TransitionStarted += this.OnTransitionStarted;
                 this.metroContentControl.TransitionCompleted += this.OnTransitionCompleted;
             }
@@ -373,7 +372,7 @@ private void RefreshPosition()
 
         private void SetTopmostState(bool isTop)
         {
-            // Don’t apply state if it’s the same as incoming state
+            // Don’t apply state if it’s the same as incoming state
             if (this.appliedTopMost.HasValue && this.appliedTopMost == isTop)
             {
                 return;
@@ -421,4 +420,4 @@ private void SetTopmostState(bool isTop)
 #pragma warning restore 618
         }
     }
-}
+}