Bring back panel expand: avoid mget calls for every visualization after panel collapse (#10043)

* Avoid mget calls for every visualization after panel collapse

This will still cause the data to refresh (an msearch call).

* use ng-hide check, not width check

src/core_plugins/kibana/public/dashboard/dashboard.html

@@ -61,7 +61,7 @@
   </div>
 
   <dashboard-grid
-    ng-if="!hasExpandedPanel()"
+    ng-show="!hasExpandedPanel()"
     on-panel-removed="onPanelRemoved"
     panels="state.panels"
     get-vis-click-handler="filterBarClickHandler(state)"
@@ -81,4 +81,6 @@
                    save-state="saveState"
                    create-child-ui-state="createChildUiState"
                    toggle-expand="toggleExpandPanel(expandedPanel.panelIndex)">
+  </dashboard-panel>
+
 </dashboard-app>

src/core_plugins/kibana/public/dashboard/grid.js

@@ -209,6 +209,10 @@ app.directive('dashboardGrid', function ($compile, Notifier) {
       // then tell gridster to "reflow" -- which is definitely not supported.
       // we may need to consider using a different library
       function reflowGridster() {
+        if ($container.hasClass('ng-hide')) {
+          return;
+        }
+
         // https://github.com/gcphost/gridster-responsive/blob/97fe43d4b312b409696b1d702e1afb6fbd3bba71/jquery.gridster.js#L1208-L1235
         const g = gridster;
 

src/core_plugins/kibana/public/dashboard/panel/panel.html

@@ -4,12 +4,9 @@
       {{::savedObj.title}}
     </span>
     <div class="btn-group">
-      <!--
-      Pulling out due to https://github.com/elastic/kibana/issues/9766.  Uncomment when fixed.
       <a aria-label="Expand" ng-click="toggleExpand()">
         <span class="fa" ng-class="{'fa-expand': !isExpanded, 'fa-compress': isExpanded}"></span>
       </a>
-      -->
       <a aria-label="Edit" ng-show="!isFullScreenMode && editUrl" ng-href="{{::editUrl}}">
         <i aria-hidden="true" class="fa fa-pencil"></i>
       </a>