D19687: Allow single images to be excluded from the slideshow

[David Redondo]

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

REVISION SUMMARY
  This allows to exlude single images from the slideshow by unchecking the little checkbox in the top right corner.
  Feature or todo?: If a folder is removed I don't touch the unchecked Slides. So the list could get very big but if a formerly removed folder is 
  added again an excluded image will be excluded again.

TEST PLAN
  - Uncheck some images
  - They don't appear in the slideshow

REPOSITORY
  R120 Plasma Workspace

BRANCH
  toggleSlides

REVISION DETAIL
  https://phabricator.kde.org/D19687

AFFECTED FILES
  wallpapers/image/backgroundlistmodel.h
  wallpapers/image/image.cpp
  wallpapers/image/image.h
  wallpapers/image/imagepackage/contents/ui/WallpaperDelegate.qml
  wallpapers/image/imagepackage/contents/ui/config.qml
  wallpapers/image/imagepackage/contents/ui/main.qml
  wallpapers/image/slidemodel.cpp
  wallpapers/image/slidemodel.h
  wallpapers/image/slideshowpackage/contents/config/main.xml

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