D29060: Port placeholder message to Kirigami.PlaceholderMessage

[Nathaniel Graham]

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

REVISION SUMMARY
  This makes the appearance more standardized by using the new Kirigmai library component.
  
  Depends on D29057 <https://phabricator.kde.org/D29057>

TEST PLAN
  F8251670: In System Settings.png <https://phabricator.kde.org/F8251670>

REPOSITORY
  R1044 Plasma Thunderbolt Integration

BRANCH
  port-to-PlaceholderMessage (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D29060

AFFECTED FILES
  CMakeLists.txt
  src/kcm/package/contents/ui/DeviceList.qml

To: ngraham, #vdg, #plasma, dvratil
Cc: plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, ragreen, ZrenBot, ngraham, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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