make popup box a bit safer [skip ci]

ButchersBoy · ButchersBoy · commit a7ae25024d35 · 2017-09-06T18:29:29.000+01:00
diff --git a/MaterialDesignThemes.Wpf/PopupBox.cs b/MaterialDesignThemes.Wpf/PopupBox.cs
@@ -417,7 +417,7 @@ protected override void OnIsKeyboardFocusWithinChanged(DependencyPropertyChanged
 
         protected override void OnMouseEnter(MouseEventArgs e)
         {
-            if (IsEnabled &&
+            if (IsEnabled && IsLoaded &&
                 (PopupMode == PopupBoxPopupMode.MouseOverEager
                  || PopupMode == PopupBoxPopupMode.MouseOver))
             {

Original file line number	Diff line number	Diff line change
`@@ -417,7 +417,7 @@ protected override void OnIsKeyboardFocusWithinChanged(DependencyPropertyChanged`
`417`	`417`
`418`	`418`	`protected override void OnMouseEnter(MouseEventArgs e)`
`419`	`419`	`{`
`420`		`- if (IsEnabled &&`
	`420`	`+ if (IsEnabled && IsLoaded &&`
`421`	`421`	`(PopupMode == PopupBoxPopupMode.MouseOverEager`
`422`	`422`	`\|\| PopupMode == PopupBoxPopupMode.MouseOver))`
`423`	`423`	`{`