Fixes the alignment of the Library Overrides Buttons in the Outiner.
Padding wasn't taken into account for multiple buttons, just for single buttons.
Also corrected y-alignment by applying appropriate padding.
|master|patch|
|{F12940430886}|{F12940885}|
|{F12940888}|{F12940431}887}|
|{F12940429}|{F12940432}|