Put username & password fields on new lines in the login form

In some languages, the string for the username label is so short that
the username text field appears on the same level as the label.  It
looks especially ugly when the password field sits on a new line, but
the username field doesn't.

Change-Id: I6a2cb05ac18ea547585ab6c738abee3d689adc66
Signed-off-by: Richard Mansfield <richard.mansfield@catalyst.net.nz>

htdocs/theme/raw/static/style/style.css

@@ -1240,6 +1240,7 @@ div.sideblock ul li {
 #login_login_username_container input, #login_login_password_container input {
 	width: 180px;
 	margin: 0 0 5px 0;
+	display: block;
 }
 /* Side Profile */
 #user-profileicon {