cb_checkbox_property callback #

Show menu item if phone have/don't have check box property

<?xml version="1.0" encoding="UTF-8"?>
<SnomIPPhoneMenu xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../minibrowser_test.xsd">
<Menu name="menu1">
 <If condition="$(checkbox_property)==available">
<MenuItem name="checkbox property available"></MenuItem>
 </If>
 <Elif condition="$(checkbox_property)==none">
 <MenuItem name="no checkbox property"></MenuItem>
 </Elif>
 <Else>
 <MenuItem name="unknown checkbox property"></MenuItem>
 </Else>
</Menu>
</SnomIPPhoneMenu>