[wmx] Small patch to ChannelMenu

Usability fix: The current channel is now marked with "> ".
The patch, in its mindboggling glory:

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>     int current = m_windowManager->channel();
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<       sprintf(temp, "Channel %d", i + 1);
---
>       sprintf(temp, "%sChannel %d", (i+1 == current)?"> ":"", i + 1);

-- 
Lasse Rasinen                       I put it all down in a letter once      
lrasinen@iki.fi                     A letter I don't send                   
                                    It made me feel much better at the time 
                                    I thought it'd help me mend