[winswitch] Empty "Start" menu in the HTML5 client

[Antoine Martin]

>> We've changed how and when this menu data is sent to the client:
>> http://xpra.org/trac/ticket/2310
>> But this should be backwards compatible.
>>
>> Make sure that start-new-commands is enabled on the server:
>> * in the default config:
>> xpra showconfig | grep start-new-commands
> 
> It says that
> (used) = True
> (default) = False
> 
>> * querying a running server:
>> xpra info | grep start-new-commands
> 
> Says:
> features.start-new.commands=True
Then everything is configured correctly, and I have no idea why your
html5 client isn't showing you the start menu.

Please create a ticket and I'll attach some patches to it that should
help debug things.

Cheers,
Antoine