D21459: Always save view settings when switching from one view mode to another

[Méven Car]

meven added a task: T8552: Polish Open/Save dialogs.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D21459

To: meven, #frameworks, ngraham
Cc: kde-frameworks-devel, michaelh, ngraham, bruns