Make Calendar inherit from _Widget, like in 1.6, so it still get deprecated methods like setAttribute(), plus the deferred-connect event handlers like onMouseMove.   Fixes #13814 !strict.
Make Calendar inherit from _Widget, like in 1.6, so it still get deprecated methods like setAttribute(), plus the deferred-connect event handlers like onMouseMove.   Fixes #13814 !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@26442 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful