Browse: no palettes in sugar-build

[manuq]

There are no context palettes in Browse running in sugar-build.

TestCase 1:

• right-click a link or an image

TestCase 2:

• select part of the page
• right-click the selection

Expected: a contextual palette should open.

This seems to be a race condition in the webkit code. If between these lines a logging is added:

        hit_context = hit_test.props.context
        logging.debug("TEST %r", hit_context)
        hit_info = {
            'is link': hit_context & WebKit.HitTestResultContext.LINK,
            'is image': hit_context & WebKit.HitTestResultContext.IMAGE,
            'is selection': hit_context & WebKit.HitTestResultContext.SELECTION,
            } 

The palette works well.