[Bug]: Xwayland popup not showing

[ZhongYic00]

SUMMARY | 问题概要

Xwayland popup不显示，contentItem尺寸为0x0

LAUNCH-WAY | 启动方式

unknown

BACKEND | 启动后端

X11

STEPS TO REPRODUCE | 复现步骤

1. run treeland
2. DISPLAY=:1 gtk-demo
3. right click to open Xwayland popup

OBSERVED RESULT | 观察到的结果

popup未显示, 移动鼠标hover在menu上使其画面更新（hover项高亮）后popup出现

EXPECTED RESULT | 期望的结果

popup 立即出现

ADDITIONAL INFORMATION | 额外补充

reason:
xwayland popup's contentItem is 0x0, no entering this code path on initial surface commit

            if (d->resizeMode == WSurfaceItem::SizeFromSurface)
                d->doResize(d->resizeMode);

possible way to fix:
as in vioken/waylib#308 (comment)

if (d->beforeRequestResizeSurfaceStateSeq <= d->surface->handle()->handle()->current.seq) {
        if (d->beforeRequestResizeSurfaceStateSeq != 0) {
            Q_ASSERT(d->beforeRequestResizeSurfaceStateSeq == d->surface->handle()->handle()->current.seq);
            d->beforeRequestResizeSurfaceStateSeq = 0;
        }