mart added a comment.
design wise i would go this way: left column: A FormLayout with labels and buttons aligned in the usual standard centered way right Column: Either an overlaysheet that opens over everything like the translations kcm, or if you want to keep the drag and drop possibility, a Drawer that opens on the right (with modal set to false) so it can reasonably both have a normal dialog bahavior (click on button, open it, click on the language, close) or drag and drop over the buttons REPOSITORY R119 Plasma Desktop REVISION DETAIL https://phabricator.kde.org/D25449 To: tcanabrava, ervin, #vdg, #plasma, mart Cc: mart, ngraham, broulik, ervin, davidedmundson, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, zachus, fbampaloukas, GB_2, ragreen, ZrenBot, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra