Using resources interface of SSE in several more user management UI

parts (first step of the refactoring to SSE)

java/com.sap.sse.security.ui/src/main/java/com/sap/sse/security/ui/client/usermanagement/UserManagementSharedResources.java

@@ -9,10 +9,15 @@ public interface UserManagementSharedResources {
     
     public interface UserManagementMainCss {
         String button();
+        String buttonprimary();
         String buttonprimaryoutlined();
+        String buttonarrowrightwhite();
     }
 
     public interface UserManagementMediaCss {
+        String grid();
+        String column();
+        String small12();
     }
 
 }