stop listening for mouse sequences before switching to normal buffer.

lib/widget.js

@@ -440,10 +440,10 @@ Screen.prototype.leave = function() {
   // this.program.clear();
   this.alloc();
   this.program.showCursor();
-  this.program.normalBuffer();
   if (this._listenedMouse) {
     this.program.disableMouse();
   }
+  this.program.normalBuffer();
   this.program.flush();
 };