[qt/f19] (4 commits) ...Desktop file sanity, drop key "Encoding", it's deprecated

[Than Ngo]

Summary of changes:

  69bb144... 4.8.4-16 (*)
  9bdae7d... fix changelog (*)
  a4ee2e1... add comment to justify use of --vendor=qt4 (*)
  2d55e14... Desktop file sanity, drop key "Encoding", it's deprecated (*)

(*) This commit already existed in another branch; no separate mail sent