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

[Nathaniel Graham]

ngraham marked 2 inline comments as done.

REPOSITORY
  R241 KIO

BRANCH
  clean-up-trash-kcm (branched from master)

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

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