Upgraded app to use Cmd 5.0.3.324 since that version fixed an issue with remote resources (refer to SDKTOOLS-919)
Style changes
Fixed an issue with the SqlProxy where it would not work in a production build.  This was due to a bug in Cmd where 'callSuper' is broke for overrides in production builds (refer to SDKTOOLS-945 for more info)
 - the fix was to parent class the old-school way
Adding in a missing requires
Removing the debug directive so that the Ext.isSpace check is done in builds as well