D12130: Use the more user-friendly string "File type" in the save dialogs

[Nathaniel Graham]

ngraham planned changes to this revision.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D12130

To: ngraham, #frameworks, #vdg, bruns, alexeymin, rkflx, abetts
Cc: kde-frameworks-devel, safaalfulaij, davidc, ltoscano, cfeck, rkflx, 
alexeymin, abetts, bruns, michaelh, ngraham