Bug 968170 - Use base class for ConcurrentLinkedQueue (r=margaret)
Bug 968170 - Change HomeConfigInvalidator to operate on pending changes (r=margaret)
Bug 968170 - Remove unused DELETED state from PanelConfig (r=margaret)
Bug 968170 - Factor out method to replace a PanelConfig in a list (r=margaret)
Bug 968170 - Only refresh all HomeConfig entries when requested (r=margaret)