enable column selection

DataEditorX/Controls/FastColoredTextBoxEx.cs

@@ -22,9 +22,15 @@ public FastColoredTextBoxEx() : base()
             this.ToolTipDelay = 1;
             this.DelayedEventsInterval = 1;
             this.DelayedTextChangedInterval = 1;
+            this.Selection.ColumnSelectionMode = true;
             this.InitializeComponent();
         }
 
+        public override void OnTextChanged()
+        {
+
+        }
+
         public new event EventHandler<ToolTipNeededEventArgs> ToolTipNeeded;
         protected override void OnMouseMove(MouseEventArgs e)
         {