Normally, pure text buttons have no padding at their edges so they align with edges of buttons, see D9058. However, in several cases there are labels aligned to the right side of a list widget row, so they're missing padding against the right edge. The fix is to use emboss = 'NONE' for such labels, which changes the drawing style, adding padding on the right edge. (Normally so labels aligned with the text from non-embossed buttons). This is not necessarily intended, but it works properly. For more information, see the revision. Differential Revision: https://developer.blender.org/D9874