D26015: Show grabby hand cursors when hovering and dragging draggable widgets

[Nathaniel Graham]

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

REVISION SUMMARY
  Same idea as D25998 <https://phabricator.kde.org/D25998>, but for desktop widgets and done on the C++ side to avoid weird
  interactions between a MouseArea and a MultiPointTouchArea on the QML side.

TEST PLAN
  F7819381: Grabby hands.webm <https://phabricator.kde.org/F7819381>

REPOSITORY
  R120 Plasma Workspace

BRANCH
  grabby-hands-on-widgets (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D26015

AFFECTED FILES
  components/containmentlayoutmanager/itemcontainer.cpp

To: ngraham, #vdg, #plasma, mart
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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