This is not a critical issue, but thought I'd throw it out there for consideration...
The Route Image screen shows both outbound Destination routes and inbound Return routes with their corresponding Route Image.
Is there ever a situation when they will differ?
If not, it would make it more usable to automatically filter out the Return routes, since we can assume they have an identical RI. Or, let the user filter by either.
I usually sort by the From column, but still, if your base's airport name starts in the middle of the alphabet, you have to scroll through all the several Return routes anyway before you can get to the rest of the outbound From routes. Sorting by To does the same, just mirror image.
This becomes more of an issue the larger the number of routes you serve.