Menu Fix and if then else

* I noticed a bug : when the menu is "fixed", the button of the cuff pluggin desappears.
When the main script oc asks for menu buttons, it has to be answered (line 183)

* Cleaning up the if then else structure.
if...if   converted into   if...else if
list param = llParseString2List... if  wrapped into else {}
So we spare useless parsing and useless tests