Fix event filter issue

When there is no warning events and you change filter to Warning in ReplicaSet Detail page,
 "No events were found" message is displayed and filter form is not shown.

Author: f-higashi

src/app/frontend/replicasetdetail/replicasetdetail.html

@@ -256,7 +256,7 @@ <h1 flex class="md-title kd-replicasetdetail-app-name">
       </md-content>
     </md-tab>
     <md-tab label="Events">
-      <md-content flex ng-if="ctrl.hasEvents()">
+      <md-content flex>
         <div class="kd-replicasetdetail-options" layout="row">
           <md-input-container class="kd-replicasetdetail-option-picker">
             <label>Type</label>
@@ -269,7 +269,7 @@ <h1 flex class="md-title kd-replicasetdetail-app-name">
           </md-input-container>
           <!-- TODO(maciaszczykm): Add event filtering by source (all, system and user). -->
         </div>
-        <table class="kd-replicasetdetail-table" cellspacing="0" cellpadding="15">
+        <table class="kd-replicasetdetail-table" cellspacing="0" cellpadding="15" ng-if="ctrl.hasEvents()">
           <thead>
           <tr>
             <th class="kd-replicasetdetail-table-header">
@@ -341,14 +341,15 @@ <h1 flex class="md-title kd-replicasetdetail-app-name">
           </tr>
           </tbody>
         </table>
-      </md-content>
-      <md-content class="kd-replicasetdetail-no-events" ng-if="!ctrl.hasEvents()">
-        <md-icon class="material-icons kd-replicasetdetail-no-events-icon">info_outline</md-icon>
-        <div class="kd-replicasetdetail-no-events-text">No events were found</div>
-        <span class="kd-replicasetdetail-no-events-info">
-          There are no events to display. It's possible that all of them have expired.
-          <a href="">Learn more</a>
-        </span>
+      
+	<div class="kd-replicasetdetail-no-events" ng-if="!ctrl.hasEvents()">
+          <md-icon class="material-icons kd-replicasetdetail-no-events-icon">info_outline</md-icon>
+          <div class="kd-replicasetdetail-no-events-text">No events were found</div>
+          <span class="kd-replicasetdetail-no-events-info">
+            There are no events to display. It's possible that all of them have expired.
+            <a href="">Learn more</a>
+          </span>
+	</div>
       </md-content>
     </md-tab>
   </md-tabs>