Refactored studio list consolidation code for add to studio; set canAdd,
canRemove flags directly on each studio.
pass flag userOwnsProject through to add to studio modal and its
buttons.
pass flag isAdmin through to add to studio and its buttons.
set flags in add to studio buttons for whether user has permission to
add project to studio, remove project from studio.
Set user ability/inability to click add to studio buttons using
permissions flags and css