Bug#928154: qt5ct: very slow startup due to enumerating icon themes

[Lisandro Damián Nicanor Pérez Meyer]

forwarded https://sourceforge.net/p/qt5ct/tickets/68/
tag upstream
thanks

Hi! sorry for the long delay. This is an upstream bug, so forwarding
there. If possible please subscribe to it and help upstream to solve
it.

Thanks!