I discovered while setting up a demo site this afternoon that in 2.6 you can no longer move activities within the menu menu block on the front page.
Really irritating in my case!
Main Menu Block loses ability to move resource or activity up or down
With AJAX disabled the move module icon still looks like drag icon
Social activities block - can't reorder contents
Error rendering 'clockify-timesheets-time-tracking-reports:timer-sidebar'. Please contact your Jira administrators.