Include option to only use manually-referenced images in the sequential mosaic

[zhafen]

Is your feature request related to a problem? Please describe.
Sequential mosaicking has a well-known issue with ballooning error, where the error builds over additional georeferences.

Describe the solution you'd like
By only using the manually-referenced images for georeferencing we will only be able to georeference a smaller subset of the images, but the error should be controlled.
Implementing this should be as simple as using a DatasetReferencer instead of a DatasetReferencerUpdater.

Describe alternatives you've considered
Alternatives include doing the actual day/night georeferencing.