D25998: [Panel] Use open/closed grabby hand to communicate that panel widgets are draggable

[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
  Improve the visual hints that widgets are draggable while in panel edit mode. Needed to
  bump the QtQuick import to make `mouseArea.containsPress` available.

TEST PLAN
  F7818223: demo-2019-12-14_17.48.30.webm <https://phabricator.kde.org/F7818223>

REPOSITORY
  R119 Plasma Desktop

BRANCH
  use-grabby-hand (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D25998

AFFECTED FILES
  containments/panel/contents/ui/ConfigOverlay.qml

To: ngraham, #vdg, #plasma
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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