qml: minor playlistview fixes

• qml/PlaylistDelegate: improve layout
  fixes binding loop on implicit height

• qml/MainDisplay: improve playlist border placement
  place it such that it won't interfere with "focus" rect of PlaylistDelegate

• qml/DragItem: allow updating indexes on requestData signal
  fixes drag'ndrop in PlaylistView

changed the description

added Component::Interface: Qt label

changed milestone to %4.0

added MRStatus::Reviewable label

added MRStatus::Acceptable label and removed MRStatus::Reviewable label

added MRStatus::Accepted label and removed MRStatus::Acceptable label

MR Acceptance result

This MergeRequest has been Accepted! Congratulations.

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• MR should be considered mergeable by Gitlab
• Last pipeline should be successful
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• All threads should be resolved, have votes and score > 0
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added 42 commits

• 6c3f7eea...cdcb0614 - 39 commits from branch videolan:master
• ea02fa5f - qml/PlaylistDelegate: improve layout
• ba836cfa - qml/MainDisplay: improve playlist border placement
• 9221f789 - qml/DragItem: allow updating indexes on requestData signal

Compare with previous version

enabled an automatic merge when the pipeline for 9221f789 succeeds

merged