How to prevent disabled users to list in the activity assignment section?

Scenario:
There are lots of disabled users in my instance. When I have to assign an activity to users, even the names of the disabled users appear in the list.

Workaround:
Currently, there is no option in Web TimeSheet to restrict the disabled users from listing in the activity assignment section however, follow the steps given below as a workaround to this requirement:

• Log into Web TimeSheet with administrative privileges.
• Click on the Administration icon on the top left of the browser.
• Select Users from the left pane, under the Users/Departments category.
• From the Display drop-down list in the Users page, select Enabled.
• Select multiple users by holding down the Ctrl key on the keyboard.
• Click the Edit button at the bottom.
• In the Edit Users page, put a checkmark beside the new activity name.
• Click Save.