QtQuick WebView - ItemSelector does not update text upon selection

I've noticed this issue when adding a custom ItemSelector to a WebView control using the QtWebKit.experimental 1.0 API. However, this bug also repros using the MiniBrowser sample app (qt/qtwebkit/source/Tools/MiniBrowser)

Repro steps:
1. Compile and run the MiniBrowser app that comes with Qt source
2. Navigate to a webpage that makes use of the <select> element (example: https://www.cs.tut.fi/~jkorpela/www/testel.html)
3. Select an element from the dropdown. Note that the text does not update after selection

Expected:
The newly selected element text should be displayed in the select box. Note that the newly selected element text does appear if you click the mouse outside the select element.

This is a significant issue because to the user it seems as if they haven't properly selected the item they intended to.