INT-110 fix for logo-scout-on-dark.png after pull/68

Lucas switched static resource loading to file:// paths.
So .less urls can't have a leading slash.

Author: kangas

styles/sidebar.less

@@ -9,7 +9,7 @@
   margin-bottom: 0;
 
   .scout-logo {
-    background: @slate1 url("/images/logo-scout-on-dark.png") center center no-repeat;
+    background: @slate1 url("images/logo-scout-on-dark.png") center center no-repeat;
     background-size: 140px 28px;
     width: @sidebar-width;
     height: 72px;