Hang on to selection state to avoid redrawing

src/SelectionManager.ts

@@ -311,7 +311,6 @@ export class SelectionManager extends EventEmitter implements ISelectionManager
    * @param event The mousedown event.
    */
   public onMouseDown(event: MouseEvent): void {
-    console.log('mousedown selectionmanager');
     // If we have selection, we want the context menu on right click even if the
     // terminal is in mouse mode.
     if (event.button === 2 && this.hasSelection) {

src/renderer/SelectionRenderLayer.ts

@@ -73,5 +73,9 @@ export class SelectionRenderLayer implements ISelectionRenderLayer {
       const endCol = viewportEndRow === viewportCappedEndRow ? end[0] : terminal.cols;
       this._ctx.fillRect(0, viewportCappedEndRow * scaledCharHeight, endCol * scaledCharWidth, scaledCharHeight);
     }
+
+    // Save state for next render
+    this._state.start = [start[0], start[1]];
+    this._state.end = [end[0], end[1]];
   }
 }