Double-click now, as it is, lets me type in text for the form property.
As I already said, F8 ist not bad, but is not good in terms of its keyboard shortcut. Additionally, if not with double-click, than at least in context menu (right-click-> go to URL) should also be there as a possibility for mouse browsing.
Apropos browsing. If F8 leads to a URL, is it possible to make dynamic history, i.e. navigating back. For instance, with F9 I go back to the file, from which F8 was called ?