D29141: [kcmkwin/kwinrules] Port placeholder message to Kirigami.PlaceholderMessage

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: iasensio, KWin.
Herald added a project: KWin.
Herald added a subscriber: kwin.
ngraham requested review of this revision.

TEST PLAN
  F8256396: Placeholder in rules KCM.png <https://phabricator.kde.org/F8256396>

REPOSITORY
  R108 KWin

BRANCH
  port-rules-kcm-to-PlaceholderMessage (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D29141

AFFECTED FILES
  CMakeLists.txt
  kcmkwin/kwinrules/package/contents/ui/RulesList.qml

To: ngraham, iasensio, #kwin
Cc: kwin, Orage, cacarry, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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