Summary:
This is a change mostly for KWin (the Wayland compositor). The internal
Wayland connection is created after the QStyle is created in the case of
KWin. But both are created before the event dispatcher is run for the
first time. So delaying by one cycle makes it work for KWin and also all
other Wayland applications.

BUG: 372001
FIXED-IN: 5.8.4

Reviewers: #plasma, broulik, hpereiradacosta

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D3239