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
This does not implement any further design, like showing a confirmation popover, but just makes sure the button works. I used a very slim package to implement copy that does not include any fallbacks for IE, since we do not need to support that here.