This is pulled from the 'panel_names' variable in the config.js file. At the moment you specify the name in that var, and that's all that's displayed to the user - it's just "graphite" or "text", lower-case, no formatting. 

I'd like "Graph" or "HTML Panel" or similarly descriptive useful stuff, but I think I see a better way to get this into the upstream version. You can nop this change.