[kde-doc-english] [trojita] /: Merge changes from topic 'built-with-qt-logo'

[Gerrit Code Review]

Git commit ff4b89bb7e7df934e7731145cb2da67caf5861eb by Gerrit Code Review, on behalf of Jan Kundrát.
Committed on 30/06/2016 at 17:48.
Pushed by gerrit into branch 'master'.

Merge changes from topic 'built-with-qt-logo'

* changes:
  GUI: About box: talk about Qt
  Unbreak position of the "About Qt" logo and downsize
  Adding the "Built with Qt" logo


http://commits.kde.org/trojita/ff4b89bb7e7df934e7731145cb2da67caf5861eb