Learning circle sign up issues

[GrifP]

• [x] Switch order of help text under phone number (Ex. +1 281-234-5678. Your number won't be shared with other participants.)
• [x] In RSVP message, just say "Please let us know if you can make it." and delete "see you soon".

[dirkcuys]

Thanks @GrifP - this is all good feedback. I think each of the following warrants its own issues:

• Add help text to TOS/privacy as well as explain what it means to opt into receiving future messages from P2PU (it's sort of ominously unclear right now)
• Add ability to add calendar events from sign up success page (perhaps all meetings?)
• Opting out line should go to a confirm page, not just automatically opt you out w/ no additional confirm. (Learner opt-out improvements)
• There should be a confirmation email confirming that you opted out. (Learner opt-out improvements)

The other 3 items are fine as check boxes in 1 issue

[dirkcuys]

@GrifP I'm also moving the last bullet to a separate issue

Stylize the opt out text to it's clearly a footer; it looks like part of the message right now.