It still caused scrollbars to appear, so I tried to change Marc's
approach - now window's scrollbars should be inactive, only dialog's
content should have them [1]. While at it, I also upgraded jQuery UI
to the newest stable version [2].
I hope I didn't break anything in the process, and that new dialog works better.
[1]
http://phpmyadmin.git.sourceforge.net/git/gitweb.cgi?p=phpmyadmin/phpmyadmi…
[2]
http://phpmyadmin.git.sourceforge.net/git/gitweb.cgi?p=phpmyadmin/phpmyadmi…
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Piotr Przybylski