Bug#862814: ibus-ui (systray icon) mis-detects Qt/KDE version

[Ralf Jung]

I can confirm that replacing the aforementioned piece of code by just

  m_indicator.set_icon_full(icon_name, "");

(i.e., removing the preprocessor conditional entirely) fixes the
problem:  The icon is properly shown in the systray.

Kind regards,
Ralf