[Webengine] HTML5 select drop-down list opens up in unexpected location with Wayland platform plugin.

A HTML select (https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_select) opens up in unexpected location when using Qt Webengine on Wayland platform plugin.

You can use Qt browser example like quick nano browser or simple browser to reproduce the issue.

With Qt Wayland compositor like the pure-qml the drop-down menu opens up always in the top-left corner of the window instead of opening below the select element like it should. With Weston compositor the drop-down menu seems to open up in random positions and even outside the window boundaries.