Show Matches improvements

[Paulo]

I really think that Show matches would benefit with some improvements:

• to be able to turn off invalid matches to just see the valid ones (blue)and zoom in to each image to better appreciate corresponding features
• to be able to select a match in particular and dynamically zoom to each corresponding point in each image

This would enable to better investigate  matches between images. A little bit like Correlator3D see attached capture...

Another improvement, would be to have a general map showing strength of links between images like Pix4DMapper...see 2nd capture

These improvements would help greatly investigate problematic image data sets...