pagecontainer("load") does not return promise

[marcuskrahl]

The current API docs for version 1.4.0 state that the method load of pagecontainer returns a promise to keep track of the load operation:

http://api.jquerymobile.com/pagecontainer/#method-load

The now deprecated $.mobile.loadPage method also returns a promise so this seems to be the desired behaviour.
As of now, the pagecontainer("load") method creates a deferred, but does not return it as a promise.

This behaviour is reproducable in the following test page:
http://jsbin.com/IFolanOW/72