Add Image View Modifier to mammography exports and interface views

[Ed McDonagh]

Image view is included, but image view modifier appears not to be. With RDSR based imports, the image view modifier is the only place we can see if the exposure is a mag view…

[Ed McDonagh]

Added view modifier column to MG detail view and to MG csv and xlsx exports. Refs #915

→ <<cset d73bee2d792d>>

[Ed McDonagh]

Updating test. Refs #915

→ <<cset 21153fcfce6d>>

[Ed McDonagh]

Merged in issue915mammoview (pull request #512)

Fixes #915

→ <<cset e891e2dc98c5>>