dashboard: do not fix and hide any controls

It would be better if view scripts would care about this, but as we
failed so many times this might be the better option.

fixes #8697

public/css/icinga/layout-structure.less

@@ -163,6 +163,11 @@ html {
 
 .dashboard .content {
   padding: 0;
+  overflow: auto;
+}
+
+.dashboard .controls {
+  display: none;
 }
 
 /* Not growing larger than 3840px at 1em=16px right now */

public/js/icinga/ui.js

@@ -718,6 +718,9 @@
         initializeControls: function (parent) {
 
             var self = this;
+            if ($(parent).closest('.dashboard').length) {
+                return;
+            }
 
             $('.controls', parent).each(function (idx, el) {
                 var $el = $(el);
@@ -761,6 +764,10 @@
                 return;
             }
 
+            if ($parent.closest('.dashboard').length) {
+                return;
+            }
+
             // Enable this only in case you want to track down UI problems
             // self.icinga.logger.debug('Fixing controls for ', $parent);