D17550: Make the open url in tab feature a bit more discoverable

[Aleix Pol Gonzalez]

apol added a reviewer: Frameworks.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D17550

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