fix(app): prevent unnecessary download of EDF/NWB data to browser

[magland]

Recently support for viewing EDF and NWB files was added by embedding a Neurosift iframe
#3187

However I recently noticed that when navigating to such a file, the entire content of the file gets downloaded to the browser before the view is rendered. This is unnecessary (and potentially very resource demanding) as neurosift handles efficient lazy-loading of the file without downloading the entire thing.

This PR solves the issue by conditionally skipping the fetch step in the case of these file extension types.

tag: @nellh

[nellh]

@magland Thanks for the contribution but I made a similar fix based on your comment and it was merged in #3226 for inclusion in our next release. This also affected Niivue, thank you for catching the issue.

[magland]

@magland Thanks for the contribution but I made a similar fix based on your comment and it was merged in #3226 for inclusion in our next release. This also affected Niivue, thank you for catching the issue.

Ah okay, great. I was able to set up a dev environment (for the frontend at least) so that was a plus. :)