[Files] Add .fig files as supported (for MatLab)

[hangerls]

Canvas will not open .fig file (Matlab). Installing MatLab Grader does not resolve the issue. Currently, the file must be downloaded in order to open or the professor must hand-code the correct html links in the code-behind screen, once the reference id of the file is obtained, but it takes a while and is prone to error.

[hangerls]

CORRECTION:

Canvas will not allow the .fig file to be uploaded...just displays an "image" that you can't do anything with. Contacted Canvas Support and it has been escalated to Tier 2.