Ooooh I love your comment, such a nice, detailed feedback! Thank you so much for taking the time to check it that well. Improvements are slow and not nearly as good as when there's criticism!

Great to hear that it's running on the Mac. Very weird that copy-paste doesn't work, on my Linux that works perfectly. I've fixed the things you mentioned (uploaded it here), except for the HTML preview, that requires some more work. Edit/delete - left click first on an entry to select it, then right click on it to show the popup menu. Let me know if it works, if it doesn't then I guess it's another Mac specific problem, besides the copy paste. I'll check around these things (could be some mistake from my side as well).

Thanks again! And glad you like the icon :)