Web+: Update URL on LoadFinished and LoadCommitted

* LoadFinished is called after redirects have taken place, so we can
show the final URL. It's also called for navigation inside a document
(jumping to anchors), whereas LoadCommitted is not.
* LoadCommitted is called earlier so we also want to set the URL there.

src/apps/webpositive/BrowserWindow.cpp

@@ -1520,6 +1520,8 @@ BrowserWindow::LoadFinished(const BString& url, BWebView* view)
 	if (view != CurrentWebView())
 		return;
 
+	fURLInputGroup->SetText(url.String());
+
 	BString status(B_TRANSLATE_COMMENT("%url finished", "Loading URL "
 		"finished. Don't translate variable %url."));
 	status.ReplaceFirst("%url", url);