D28277: [UrlButton] Don't show tooltip if it would be empty

[Kai Uwe Broulik]

broulik created this revision.
broulik added a reviewer: mart.
Herald added a project: Kirigami.
Herald added a subscriber: plasma-devel.
broulik requested review of this revision.

TEST PLAN
  F8198260: Screenshot_20200325_141929.png <https://phabricator.kde.org/F8198260>
  None of these links do anything when installing packages but at least the tooltip now doesn't erroneously show anymore

REPOSITORY
  R169 Kirigami

REVISION DETAIL
  https://phabricator.kde.org/D28277

AFFECTED FILES
  src/controls/UrlButton.qml

To: broulik, mart
Cc: plasma-devel, fbampaloukas, GB_2, domson, dkardarakos, ngraham, apol, ahiemstra, davidedmundson, mart
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