Option to sort activities

This new function will be available on the main page under activities (projects>activities). From there you can sort the activities either by title or by activity number. And if you have chosen to set a sort order and saved the filter, the next time you enter the activity page you will have an overview of the sort order that has been previously saved from last time.

Note that the sort function will override the drag and drop if that function is already used. When using the drag and drop function after sort order is chosen, then it is the main sort order that is saved - but if you do any changes with drag and drop then this will override the sort order.