Fix exception while creating a conversation
Fix exception while creating a conversation

When confirming the creation of a one on one conversation with a new
contact, the first click would do nothing but the second click would
work. Now the first click works.

Fix by only reject new conversation creation if not saved.

// FREEBIE

nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop