D10183: Adjust spacing between text and plotter line in Speed tab of nm applet

[Raghavendra Kamath]

kamathraghavendra added a reviewer: davidedmundson.

REPOSITORY
  R116 Plasma Network Management Applet

REVISION DETAIL
  https://phabricator.kde.org/D10183

To: kamathraghavendra, davidedmundson
Cc: plasma-devel, davidedmundson, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, sebas, apol, mart