KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
If you encounter a bug, proceed to https://bugs.kde.org/, check whether it has been reported.
If it hasn't, report it yourself.
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Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.
I have the permanently delete option enabled on the right click menu, and every time I want to delete something, this is how large it shows up. 
. Is there a way to make it smaller? This is unnecessarily large for a window with very little functionality. Is this a bug that I should report?
Very big decisions need very big windows. The window size should scale with file size.
Joking aside, do you have any window rules?
yes
this wasn't supposed to make sense
Yup. Yelling at me not to delete it. Lol