Faster execution for scripts from System Tools

25% faster to apply Overlays selector.
When MainUI goes back the default speed is restored.

Emus/_SystemTools/launch.sh

@@ -1,8 +1,11 @@
 #!/bin/sh
 echo $0 $*
 
+echo performance >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
+echo 1416000 >/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
+
 # Launch tool script file
-echo "******************************************************************-*-*- $1"
+echo "*** Launching $1 ***"
 "$1" 
 
 # we don't memorize System Tools scripts in recent list