D6322: [FolderView] Don't calculate extra spacing when we don't need to.

[Chris Holland]

Zren marked an inline comment as done.

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D6322

To: Zren, hein
Cc: plasma-devel, ZrenBot, spstarr, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, sebas, apol, mart, lukas