D17323: Panel edit mode: change screen edge button hover cursor, add icons to screen edge button and panel size button

[Björn Feber]

GB_2 created this revision.
GB_2 added reviewers: Plasma, VDG.
GB_2 added projects: Plasma, VDG.
Herald added a subscriber: plasma-devel.
GB_2 requested review of this revision.

REVISION SUMMARY
  Modifies the screen edge button and panel size button in the panel edit mode to make them easier to understand and look better (as suggested in this Phabricator task: https://phabricator.kde.org/T10047):
  
  - When you hover over the screen edge button it now shows a move cursor (SizeAllCursor)
  - The screen edge button now has an icon (transform-move)
  - The panel size button now has an icon (zoom-fit-width/zoom-fit-height)
  
  F6451696: Panel Edit Mode Buttons.png <https://phabricator.kde.org/F6451696>

TEST PLAN
  Open the panel edit mode.

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D17323

AFFECTED FILES
  desktoppackage/contents/configuration/panelconfiguration/EdgeHandle.qml
  desktoppackage/contents/configuration/panelconfiguration/SizeHandle.qml

To: GB_2, #plasma, #vdg
Cc: #vdg, plasma-devel, #plasma, alexde, IohannesPetros, trickyricky26, ragreen, Pitel, crozbo, ndavis, ZrenBot, firef, skadinna, lesliezhai, ali-mohamed, jensreuterberg, aaronhoneycutt, abetts, sebas, apol, mbohlender, mart
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