Update resizescreen

Seems sh (at least on Ubuntu) doesn't support how I do if/then  or the read commands. Thus change to /bin/bash unless I find a sh safe way of doing it.

resizescreen

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 #check for dualscreen
 dualscreen=$(xrandr | grep -v disconnected | grep -v VIRTUAL | grep connected | wc -l)