[browser] Don't hide toolbar while waiting for new tab. Fixes JB#53613
[browser] Don't hide toolbar while waiting for new tab. Fixes JB#53613

Count changed signal caused state change in overlay.animator and hid
the toolbar. Don't do state change if webView is waiting for new tab.

Signed-off-by: Tomi Leppänen <5c72ffe736be5009d7fd5b3f191ca04ec28863e0@jolla.com>

sailfishos/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser