D18737: [image wallpaper] Show wallpaper title/filename on grid view delegates

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: VDG, Plasma.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  This patch makes the wallpaper chooser grid view delegates show the wallpaper's
  title (if it has a desktop file) or filename (if it doesn't). Authorship information
  is shown via a tooltip, if present.

TEST PLAN
  {F6587535 <https://phabricator.kde.org/F6587535>. size=full}
  F6587536: Tooltip shows authorship information, if present <https://phabricator.kde.org/F6587536>

REPOSITORY
  R120 Plasma Workspace

BRANCH
  wallpaper-delegates-have-names (branched from Plasma/5.15)

REVISION DETAIL
  https://phabricator.kde.org/D18737

AFFECTED FILES
  wallpapers/image/imagepackage/contents/ui/WallpaperDelegate.qml

To: ngraham, #vdg, #plasma
Cc: plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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