D12986: [Trash KCM] Clean up and standardize UI to be in line with the KDE HIG

[Nathaniel Graham]

ngraham edited the test plan for this revision.
ngraham added a subscriber: kfm-devel.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D12986

To: ngraham, #dolphin, #frameworks, #vdg
Cc: kfm-devel, kde-frameworks-devel, michaelh, ngraham, bruns