D8590: KPageListView: Update width on font change

[Nathaniel Graham]

ngraham added reviewers: dfaure, rkflx, broulik.

REPOSITORY
  R236 KWidgetsAddons

REVISION DETAIL
  https://phabricator.kde.org/D8590

To: volkov, cfeck, wojnilowicz, dfaure, rkflx, broulik
Cc: #frameworks