[Designer] #424 apply Redwood inspired styling

Refs #424

src/main/resources/templates/probe.html

@@ -32,7 +32,7 @@
         Limit
         <input class="form-control" name="limit" type="number" min="1" max="500" value="50">
       </label>
-      <button class="btn btn-primary" type="submit">호출</button>
+      <button class="btn rw-btn-primary" type="submit">호출</button>
     </form>
   </section>