Client: Fix reverse screen order

[ChangeLog][QPA plugin] Fixed a bug where QGuiApplication::screens() and
primaryScreen() would return initial screens in the reverse order they were
added by the compositor. QGuiApplication::primaryScreen() will now return the
first output added by the compositor.

Calling forceRoundTrip in registry_global() meant it would call itself
recursively if there were additional wl_output events in the queue. This in
turn meant the screens got added in the reverse order. Instead we now add the
screen to a list of not yet initialized screens and add it properly when we've
received the required done events (wl_output and possibly zdg_output_v1).

This also has the added benefit of wl_output hot plugging not calling
forceRoundTrip().

Fixes: QTBUG-72828
Task-number: QTBUG-81657
Change-Id: I35c6959d6c219f65fd19d571a25b5a6cdb3f741b
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
(cherry picked from commit 475910a75a5cd3332fe2f0e5740c4c3c2c0b8987)
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

0 files changed, 0 insertions, 0 deletions