Add an option to include the list of people invited to each mail message

[katilp]

Just got my first newdle poll, it looks very nice. Just some comments from the user side, feel free to take them into account or to ignore

• [ ] it would be helpful to see other participants' choices (as in doodle). It often happens that one tries to fit several appointments and the options partially overlap, and seeing the likely choices before the poll is completed or the meeting is called makes work scheduling easier.

• [ ] The possibility of finding email addresses when defining the poll is very nice. However, participants get only a personal message without knowing who others are invited. It would be nice to have an option to include the list of all people invited to each participant's mail message (it doesn't need t be cc but just a list in the mail body)

[ThiefMaster]

Thanks for the feedback!

For your first suggestion there's already #174 which should mostly cover it.

I agree that the second option could be useful as well; if we let participants see the summary page and also show the names of invited participants there even if they haven't replied yet, that would probably solve it.