[selector] allow inplace operator in selector computation
Intended to facilitate overriding of existing selectors chain in view declaration.
It make the code shorter and clearer when you've to import long module pathnames
CubicWeb.require('ajax.js');
function removeBookmark(beid) {
d = asyncRemoteExec('delete_bookmark', beid);
d.addCallback(function(boxcontent) {
reloadComponent('bookmarks_box', '', 'boxes', 'bookmarks_box');
document.location.hash = '#header';
updateMessage(_("bookmark has been removed"));
});
}