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Created attachment 145477 [details] Open Project Window The column width of the folder tree is too small, this must be a bug. See the attachment for clarification of what I mean.
For me, the column width doesn't look like that at all. Whoever responds to the bug is probably going to say "works for me". Maybe it's a problem of the look and feel you're using. Do you see the same thing when you're not using the dark look and feel?
uninstall external plugins such as dark theme and nimbus.theme *** This bug has been marked as a duplicate of bug 226761 ***