Zooflow: Fix theming, show overlay for keyup event in search

GUIs.ZooFlow/Search/frmFlowSearch1.vb

@@ -282,7 +282,16 @@ Public Class frmFlowSearch1
             If txtSearchInput.Text = String.Empty Then
                 Return
             End If
-            Await Search_GO()
+
+            Dim oHandle = SplashScreenManager.ShowOverlayForm(Me)
+
+            Try
+                Await Search_GO()
+            Catch ex As Exception
+                Logger.Error(ex)
+            Finally
+                SplashScreenManager.CloseOverlayForm(oHandle)
+            End Try
         End If
     End Function
     Private Function GetResultWindowString(SearchContent As String) As String