Dont execute folderwatch functions when indexing is active

Global_Indexer/frmIndex.vb

@@ -1250,6 +1250,8 @@ Public Class frmIndex
     End Sub
     Private Sub frmIndex_FormClosing(sender As Object, e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
         Try
+            INDEXING_ACTIVE = False
+
             ' This prevents the thread issue when the form containing the viewer is opened via ShowDialog.
             DocumentViewer1.Done()
 
@@ -1265,6 +1267,8 @@ Public Class frmIndex
         ' Abbruchzähler zurücksetzen
         CancelAttempts = 0
 
+        INDEXING_ACTIVE = True
+
         Try
             CURRENT_ISATTACHMENT = False
             DropType = ClassDatabase.Execute_Scalar("SELECT HANDLE_TYPE FROM TBGI_FILES_USER WHERE GUID = " & CURRENT_WORKFILE_GUID, MyConnectionString, True)