Show fold/unfold button in cards only when needed

app/modules/components/card/card-templates/card-unfold.jade

@@ -1,6 +1,6 @@
 .card-unfold.ng-animate-disabled(
     ng-click="vm.toggleFold()"
-    ng-if="vm.visible('unfold')"
+    ng-if="vm.visible('unfold') && (vm.hasTasks() || vm.hasVisibleAttachments())"
     role="button"
 )
     tg-svg(svg-icon="icon-view-more")

app/modules/components/card/card.controller.coffee

@@ -23,6 +23,12 @@ class CardController
     visible: (name) ->
         return @.zoom.indexOf(name) != -1
 
+    hasTasks: () ->
+        return @.item.getIn(['model', 'tasks']).size > 0
+
+    hasVisibleAttachments: () ->
+        return @.item.get('images').size > 0
+
     toggleFold: () ->
         @.onToggleFold({id: @.item.get('id')})