MDL-58235 block_myoverview: add styling for clean theme

Part of MDL-55611

theme/bootstrapbase/less/moodle/blocks.less

@@ -322,6 +322,7 @@
             /*rtl:ignore*/
             left: 50%;
             margin: 0;
+            padding: 0;
             transform: translate(-45%, -45%);
             color: #fff;
             height: (@chart-size / 2);

theme/bootstrapbase/style/moodle.css

@@ -16359,6 +16359,7 @@ body {
   /*rtl:ignore*/
   left: 50%;
   margin: 0;
+  padding: 0;
   transform: translate(-45%, -45%);
   color: #fff;
   height: 35px;

theme/bootstrapbase/templates/block_myoverview/event-list-item.mustache

@@ -69,8 +69,12 @@
             </div>
         </div>
         <div class="visible-tablet span6">
-            <div class="text-right text-truncate">{{enddate}}</div>
+            <div class="text-right text-truncate">
+                {{#userdate}} {{timesort}}, {{#str}} strftimerecent {{/str}} {{/userdate}}
+            </div>
         </div>
     </div>
-    <div class="text-right visible-phone text-truncate">{{enddate}}</div>
+    <div class="text-right visible-phone text-truncate">
+        {{#userdate}} {{timesort}}, {{#str}} strftimerecent {{/str}} {{/userdate}}
+    </div>
 </li>