#9 A better visual indicator to show problems with input files

[Matthew Traherne]

Thanks again for considering any suggestions for this great app!

It's great when the application lets you know that it can't find a file (or there is a problem with the file) and then stops the production of the merged PDF.

However, if you have a long list it can be tiresome to find the missing file/files.

Something that would be really useful would be to give some visual cue to show if there was a problem with the file/files. (ie turning the line red).