Expose container type and ID columns in dbfiles table in BETY web interface

[serbinsh]

I was attempting to add PFT posterior files from an existing HPDA posterior onto a new machine in order to use with other simulations . I can register the files easily enough but I can't edit existing posteriors to add files to them on a new machine nor are the container type and ID columns available to edit in the dbfiles page to facilitate the linking of these files to an existing posterior ID. Would it be possible to enable this?

[serbinsh]

FYI - this is this function, which i have not yet tested:

https://github.com/PecanProject/pecan/blob/494b6717440e0d8245ec9234040f718b807bc29f/base/db/R/dbfiles.R#L314