Marked CP-Images shown in 3D

Images that are selected in Control points menu should be shown in 3D view, alternatively all images present in one CP when selecting the CP itself.

currently there are orange lines pointing to the cameras from the CP in the 3D scene, when clicking the CP or any image assigned to it in the 1Ds menu,

you can also click a CP in the 3D and the lines connecting the CP with the cameras will show up