VMROSD: Allow the seekbar to be hidden and the video window to be changed after the OSD has started.

This is done in preperation of D3DFullscreen switching.
Allow the user to switch between D3DFullscreen and windowed mode during playback.

This allows D3DFullscreen to exit like regular fullscreen.
VMROSD: Update the OSD bitmap after setting a new video window.
MainFrm: Stop the hide cursor timer when exiting D3DFullscreen.
MainFrm: Call ToggleD3DFullscreen() from OnViewFullscreen() when it is enabled.
MainFrm: Correct some fullscreen checks to support D3DFullscreen.
MainFrm: Corrected checks that should only return true if D3DFullscreen is actually active.
EVR-CP: Get the locks before changing the video window.
SyncRenderer: Support D3DFullscreen switching.
VideoRenderers: Check pointer for GetFullscreen() functions.
MainFrm: Make sure the right IsD3DFullscreen function is called.

IsD3DFullscreen() should be called to check if it is enabled.
IsD3DFullscreenMode() should be called to check if it is active.
MainFrm: Make the D3DFS behaviour consistent with normal FS when pressing ESC.
VMR9: Add support for changing the video window during playback.
VideoRenderers: Add interface to set and query D3DFullscreen mode.
MainFrm: Make use of the new ID3DFullscreenControl interface and add support for VMR9 in ToggleD3DFullscreen().
COuterVMR9: Make the type for the presenter more specific.
VideoRenderers: Outer renderers should query their presenter for interfaces too.
VideoRenderers: Set m_bPendingResetDevice flag before resetting the device after a video window switch.
MainFrm: Move D3DFS display mode switching to ToggleD3DFullscreen().

Also use the normal way of determining the frame rate instead of using the method based on MediaInfo.
AppSettings: Only return true for IsD3DFullscreen() if it is actually supported.
MainFrm: Remove renderer check which is now always redundant.
MainFrm: Don't start in fullscreen if D3DFullscreen is enabled.