Remove trailing comma

Using version 1.5.0rc2 and running the Sencha cmd (build mobile app), one gets a warning from the Sencha cmd:
```
[WRN] C1000: Rhino Parse Warning (Trailing comma is not legal in an ECMA-262 object initializer =>                     }
) -- D:\Applications\Mapfish\sitn_internet\sitn\static\mobile\app\controller\Main.js:337:21
```
Removing the trailing comma resolves this.

Please review (and eventually merge if you agree...)