Ok, I know what you mean now and did add the exit button to shutdownmenu and on/off rightsubmenu.
If you can't wait till next update, add to 720\DialogButtonMenu.xml ...line 103 (Below "button" id=3112)
Code:
<control type="button" id="3111">
<description>Exit button</description>
<include>ButtonMenuButtonDims</include>
<texturefocus>ButtonMenuExitFO.png</texturefocus>
<texturenofocus diffuse="GreyDark.png">ButtonMenuExitFO.png</texturenofocus>
<onclick>XBMC.Quit()</onclick>
<font>-</font>
<label>$LOCALIZE[13012] XBMC</label>
<visible>System.LoggedOn</visible>
</control>
And add this thumb:
to the skin media folder.
The button incl. thumb will be in schutdown menu
If you also like to have the button in on/off rightsubmenu add to 720p\Home.xml ...line 1172
Code:
<item id="9">
<description>Exit Button</description>
<label> $LOCALIZE[13012] XBMC </label>
<onclick>XBMC.Quit()</onclick>
</item>
Btw: Does the button restart xbmc works for you ?
Here it will only exit xbmc and not restart it. (Using windows xp)
XBMC.RestartApp() is an build in function and it does work on the xbox.