Use Kirigami.ActionToolBar to auto-resize the SDDM KCM's footer
Based on the work done for the Icons KCM, this change ensures that the buttons at the bottom of the KCM actually fit in the window, by using Kirigami.ActionToolBar's ability to collapse buttons which don't fit into a popup menu style list of actions. Thanks to @ilyabizyae for noticing this one.
Without this patch (picture from Ilya's comment on plasma-workspace!665 (comment 194224)):
With this patch:
Edited by Dan Leinir Turthra Jensen