COO-41 Add image labels

[prkrtg]

Adds image labels for improved clarity in the GUI

Edit: New update now includes the file location of Image 1 and 2
The result label doesn't have a file location due to being in memory and the user has an option to write to disk if needed

[scizen9]

I would suggest a unique identifier, like the filename, for the image labels. For ZMQ shared images, we may have to use some other identifier that would be in the metadata (header) like a serial number perhaps.

[scizen9]

Unambiguous label so users will know exactly what image is displayed. Approve.