feat(mocks-overview): add badge colors (#10)

When using a method that has no badge color defined, the badge will be invisible (white on white).

*added default grey color for undefined methods
*added a seagreen color for patch method

src/app/mocks/overview/overview-row.component.scss

@@ -34,6 +34,7 @@
       color: white;
       padding-top: 5px;
       margin-top: 2px;
+      background: #b1aeae;
 
       &-delete {
         background: crimson;
@@ -50,6 +51,10 @@
       &-put {
         background: seagreen;
       }
+
+      &-patch {
+        background: seagreen;
+      }
     }
   }
 }