Update 1.7.15 - new actor animations, various fixes

- 80+ new actor animations and stunts, available in Direct Scene menu
- added search box in animations/costumes/stunts tabs in Direct Scene menu
- show notification when SFX/VFX designers are not assigned to an office
- fix bug where reshooting a scene in some tutorials would prevent tutorial completion
- fix bug that prevented completing the "PR Pusher" mission
- fix bug that sometimes made desks and other objects unreachable by employees
- fix "Learn the ropes" Steam achievement not being awarded
- increased duration of SFX/VFX designer tasks and other filming tasks