Open "View Live Version" and "Preview Changes" in a new window

STUD-2058
Don't release date if it hasn't been changed.

STUD-2056
Merge pull request #4705 from edx/benmcmorran/open-in-new-window

Open "View Live Version" and "Preview Changes" in a new window
Merge pull request #4702 from edx/christina/fix-default-settings

Christina/fix default settings
Remove specific wording for live content warning
Studio: revising unscheduled icon in outline UI
STUD-2061
Merge pull request #4711 from edx/talbs/fix-studio-outline-unscheduled-icon

Studio: revising unscheduled icon in outline UI
Merge pull request #4708 from edx/benmcmorran/remove-extra-live-warning

Remove specific wording for live content warning
pep8/pylint
Studio: revising clear icon used within outline settings modal
Studio: revising size and field layout of outline settings modal
Merge pull request #4710 from edx/talbs/fix-studio-outline-settings-modal

Studio: Outline Settings Modal UI Fixes (STUD-2057)
Add basic staff lock settings from course outline
Pass staff lock info to container page
Fix find_staff_lock_source

Always include "explicit_staff_lock" in xblock_info
Use explicit staff lock on course outline
Add inherited staff lock messages to unit page
Add tests for xblock_info staff locking changes
Rename explicit_staff_lock to has_explict_staff_lock
Add bokchoy tests for staff locking on course outline