D21551: mobile: Thumbnails: improve placement of searchField and label

[Jonah Brüchert]

jbbgameich added a reviewer: Okular.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D21551

To: jbbgameich, #okular
Cc: okular-devel, joaonetto, tfella, ngraham, darcyshen, aacid