Fix ActivityItem activityHover error

Signed-off-by: Claudio Cambra <claudio.cambra@gmail.com>

Author: claucambra

src/gui/tray/ActivityItem.qml

@@ -89,7 +89,6 @@ ItemDelegate {
             linksForActionButtons: model.linksForActionButtons
             linksContextMenu: model.linksContextMenu
 
-            moreActionsButtonColor: activityHover.color
             maxActionButtons: activityModel.maxActionButtons
 
             flickable: root.flickable