mshtml: Call IDocHostUIHandler_HideUI and IDocHostUIHandler_ShowUI when changing an UI active window to be in edit mode.

Add tests for the behaviour of changing edit mode when a UI window is active.

Don't reset window_active in OleDocumentView_UIActivate.

mshtml: OleDocumentView_UIActivate should call IOleInPlaceUIWindow_SetActiveObject and IOleInPlaceFrame_SetBorderSpace.

Add a test to show this behaviour.
Don't call nsIWebBrowserFocus_Activate when just activating the window. 
Instead call it when UI-activating the window.

Vertex declarations are a d3d feature, thus they should be destroyed
before d3d is shut down in wined3d. The surface type should be reset
afterwards to prevent avoid gl surface afterwards and before a new
render target is created.