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The OK, Apply and Cancel buttons in the KDE Energy Saving dialog are below the
bottom of the screen and the user is not able to re-size the window.  Enter
does work to save the selected settings and Escape works to discard them, but
the buttons are unavalable.

I understand that this is a KDE issue and not openSUSE per se.

Reproducible: Always

Steps to Reproduce:
1. Launch KDE Energy Saving dialog.

Actual Results:  
Bottom of window is off the screen and the user is not able to resize it.

Expected Results:  
A window with OK, Apply and Cancel buttons visible and the user has the ability
to resize the window.

This dialog window has a smaller default size in KDE 5.5.x and the user is able
to resize it.