D8695: Fix ampersand characters not showing in tab titles

[Corentin Risselin]

corentinr edited the summary of this revision.

REPOSITORY
  R106 KSysguard

REVISION DETAIL
  https://phabricator.kde.org/D8695

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