Mark documents as imported and clean them up when closing app, update to DevExpress 21, small tweaks

MultiTool.Form/frmMain.vb

@@ -20,8 +20,9 @@ Public Class frmMain
         Try
             Text = String.Format(My.Resources.frmShared._0____WebService_Multitool_für_WinLine, My.Resources.frmShared.Auswahl_der_Vorlage)
 
-            LogConfig = New LogConfig(LogConfig.PathType.AppData, Nothing, Nothing, Application.CompanyName, Application.ProductName)
-            LogConfig.Debug = True
+            LogConfig = New LogConfig(LogConfig.PathType.AppData, Nothing, Nothing, Application.CompanyName, Application.ProductName) With {
+                .Debug = True
+            }
             Logger = LogConfig.GetLogger()
             Logger.Info("Starting {0}, Version [{1}]", Application.ProductName, Application.ProductVersion)
 
@@ -108,6 +109,10 @@ Public Class frmMain
                 Exit Sub
             End If
 
+            ' Initialize template tables
+            oTemplate.Tables = New List(Of Template.Table)
+
+            ' Fill tables
             oTemplate = TemplateLoader.UpdateTemplateFromFile(oTemplate, My.GeneralConfiguration.TemplateDirectory)
             oTemplate = TemplateLoader.UpdateTemplateFromDatabase(oTemplate, TemplateLoader.TemplateConfiguration)