Convert set of markdown editors to bootstrap

Asserting that this fixes the following issues (and sets us up to more easily fix other "to bootstrap" issues):
SWC-1584
SWC-1587
SWC-1582
SWC-1581
SWC-1576
SWC-1580
SWC-1578
SWC-1593
SWC-1961
SWC-1962