If KHelpCenter isn't available fallback to opening doc at docs.kde.org
Summary:
UrlHandler from KGUIAddons sets a handler for help:/ urls, which opens
khelpcenter if it's available or falls back to opening the relevant page
at docs.kde.org.
Explicitly add KGuiAddons to find_package() and target_link_libraries().
Depends on D27615
BUG: 405647
FIXED-IN: 5.18.1
Test Plan:
- make sure khelpcenter is not installed and open systemsettings
- navigate to any module (one that has Help visible, e.g. Fonts), "Help" button is disabled
- install khelpcenter and restart systemsettings, the "Help" button should be enabled
Reviewers: Plasma, apol
Reviewed By: apol
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D27518