Fix broken symbol exports for OpenViewCore and QmlItems modules

Signed-off-by: Taylor Braun-Jones <taylor@braun-jones.org>
Fix missing header

Signed-off-by: Taylor Braun-Jones <taylor@braun-jones.org>
Updates for constructor changes in Mouse*Event classes

Signed-off-by: Taylor Braun-Jones <taylor@braun-jones.org>