This will allow later to be able to operate on the binding despite the
element is borrowed.
Since the Binding itself is in a RefCell, the analysis don't need to
be anymore.
To do this change, a small change in the binding_analysis logic was required
which means that we will now detect binding loop if a binding was causing
two binding loop. (before, only one binding loop was detected)
because we don't want the lowered state property to look like we set a property on it.
Also do the ensure_window before because it need to be done before to be assigned
the default color
Don't put them in a fake expression.
This simplifies a bit the expression handling, and will make
possible to fix analysis that needs a vew into the aliases
