Just go into a text input, tap the shift button twice (don't caps lock, just turn caps off then on), then tap on the snap logo. This only works on ios, so there's no solution for android yet.
I'm not 100% sure about that particular block, but a lot of the ones in that list used to be official blocks that have been replaced to give a more uniform interface or to make programming easier, but are still included in Snap!, albeit hidden, so that we can load projects written in an older version.