Synchronise useractions menu with taskmanager

Changes the order of the useractions menu to fit the one of
taskmanager. There are still some differences:
* Taskmanager is missing Activities menu
* Taskmanager is missing Window Tabbing support
* Taskmanager is missing window settings (e.g. shortcut)
* Useractions is missing launcher support

REVIEW: 104374
FEATURE: 296056
FIXED-IN: 4.9.0