Special K v 0.8.45

 + Improved vertex memory alignment in ImGui D3D9 renderer
 + Fixed memory alignment issues for non-standard packed DXTn textures (D3D9)
 + Fixed Agarest Zero / 2 D3D9 texture management
 + Exit Confirmation Dialog now focuses on the Cancel button using gamepad input
 + Thread optimizations for D3D9/11 texture injection