Add check to see if permission is available (with isBoardMember)

client/components/cards/cardDetails.jade

@@ -87,13 +87,14 @@ template(name="cardDetails")
     hr
     .activity-title
       h2 {{ _ 'activity'}}
-      .material-toggle-switch
-        span.toggle-switch-title {{_ 'hide-system-messages'}}
-        if hiddenSystemMessages
-          input.toggle-switch(type="checkbox" id="toggleButton" checked="checked")
-        else
-          input.toggle-switch(type="checkbox" id="toggleButton")
-        label.toggle-label(for="toggleButton")
+      if currentUser.isBoardMember
+        .material-toggle-switch
+          span.toggle-switch-title {{_ 'hide-system-messages'}}
+          if hiddenSystemMessages
+            input.toggle-switch(type="checkbox" id="toggleButton" checked="checked")
+          else
+            input.toggle-switch(type="checkbox" id="toggleButton")
+          label.toggle-label(for="toggleButton")
     if currentUser.isBoardMember
       +commentForm
     if isLoaded.get