Provide manual way to send a confirmation email to volunteer

[yashodha]

When a person fills out the [sign-up form](/sign-up form), CiviVolunteer sends them a confirmation email with the project managers BCC'd. (This email is not sent when using "Assign volunteers".) Given that we have a drag and drop interface, we would like to have some caution and not send flurry of emails on that interface.

But what we could do is provide the ability to manually notify the volunteers with all the specific needs data and the best place to do this on Roster screen.We already have ways to reach out to the volunteer : Email/Call/Sms

I propose adding another option Notify which is when the volunteer notification will be sent.

[ginkgomzd]

I like the proposal.
Do you envision it as a one-click action, or does it launch a dialogue to customize the notification?