I use a 16" MacBook Pro, and if I go full screen, and then reload it sometimes corrects the overlay, but it's not totally different than the scrolling issue you addressed a couple of years ago in the same area.
That green button creates a white column that covers the selections boxes, unless I scroll the rest of the window sideways from below it. That's the part you fixed once before. Could you add it to the row above that table? I've attached a screenshot for you.
I think you're doing it wrong: you shouldn't add files reported as modified as exception. Instead you should use the "Mark all modified files as safe" button.
Because adding files as exception those files will never be checked; if any unauthorized access modifies them you will not be notified. Marking all as safe means all those files have been modified by you or an update and its new unique identifier is updated so you will be notified in a future if any change is done to them. This is why I put the "Extensions installed/updated" button: there you can see if a related updated have been done.
For instance, suppose you have 30 files modified of my extension, Securitycheck Pro. When you go to the "Extensions installed/updated" button you see that Securitycheck Pro has bee updated, so you can safely click on the "Mark all modified files as safe" button. If in a future another update for Securitycheck Pro is done, you will be warned again of files modified.
And take note that you don't need to send modified files against the OPWAST scanner because a malware scanner is automatically done for modified files (if the option Global configuration -> File integrity tab -> Look for malware option is set to "Yes"). So everytime a file integrity is launched all modified files are checked by the malware scanner warning you if a suspicious pattern is found.
I think that was a while ago that I did that; other than after a recent Oopswat check on suspicious code, when the mark as safe wasn't available.
If I delete those files now, since most of them are cache files, will that crash the site?
I had the exact same issue with the red button on the file manager side; it covers the column to check the boxes.