2.33.3 bugfix release

* Drop obsolete function application_exe_escaped.
* Reduce code duplication when fetching the type of the default application.
* Remove shebang from fish completion file.
* Fix config file path in manpage and zsh-completion.
* Add --list-packages option to zsh completion.
* Add support for multiple Qt 5 native libraries:
  - libQt5Core.so.5
  - libQt5Gui.so.5
  - libQt5Widgets.so.5