Inherit colour for linked file icon in file tree (#8032)

GitOrigin-RevId: 0ebfc7abba345354d1a2063b45bbd3ce10374008

services/web/frontend/stylesheets/app/editor/file-tree.less

@@ -182,7 +182,7 @@
 
             + .linked-file-highlight {
               & {
-                color: white;
+                color: inherit;
               }
               position: relative;
               top: 4px;