Makes the width of .login-overlay__logo dynamic

Author: skttl

src/Umbraco.Web.UI.Client/src/less/pages/login.less

@@ -30,11 +30,14 @@
     position: absolute;
     top: 22px;
     left: 25px;
-    width: 30px;
     height: 30px;
     z-index: 1;
 }
 
+.login-overlay__logo > img {
+    max-height:100%;
+}
+
 .login-overlay .umb-modalcolumn {
     background: none;
     border: none;