[BUG] Heimdall Comparison View Deselect Leads to 404

[em-c-rod]

Describe the bug
With 3 data files loaded in Heimdall, I look at the comparison view and click the right arrow on the list of changed results to see the difference between the second and third files. While in that view, I click the upper left hand hamburger menu and deselect the first file because I only care about the second and third files right now. I click out of it the hamburger menu and all three files are still in view and the page is frozen. I refresh and get a 404 error.

To Reproduce
Steps to reproduce the behavior:

1. Load 3 data files loaded in Heimdall
2. Click Comparison view
3. Click the right arrow on the list of changed results to see the difference between the second and third files
4. Click the upper left hand hamburger menu
5. Uncheck the first file
6. Click out of it the hamburger menu
7. See error: all three files are still in view and the page is frozen. Refresh and get a 404 error.

Expected behavior
I expect the first file to no longer be viewable and the second and third file to be compared in view with no errors. (the same functionality as if I had unchecked the third file instead of the first two)

Desktop (please complete the following information):

• OS: macOS
• Browser: Firefox
• Version 134.0.2