D9655: [Kickoff] Hide tab bar if only one tab button is configured

[Kai Uwe Broulik]

broulik edited the summary of this revision.

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D9655

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