Improve config screen, add waiting days

MultiTool.Form/frmImportMain.vb

@@ -204,6 +204,8 @@ Public Class frmImportMain
         Dim oResult As DialogResult = MsgBox(oMessage, MsgBoxStyle.Question Or MsgBoxStyle.YesNo, Text)
 
         Try
+            BeginLoadingUI()
+
             If oResult = DialogResult.Yes Then
                 Dim oDocument As Document = GridViewFiles.GetRow(GridViewFiles.FocusedRowHandle)
                 Dim oNewDocument = Await DocumentLoader.LoadFile(oDocument.File, CurrentTemplate, lookupMandator.EditValue)
@@ -222,6 +224,9 @@ Public Class frmImportMain
         Catch ex As Exception
             FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Neuladen_des_Dokuments)
 
+        Finally
+            EndLoadingUI()
+
         End Try
     End Sub