Ryan Ashbrook

Yes, go to your Admin CP > Members > Groups - click the Padlock (titled "Permissions") next to a group, and you can set permissions across the whole suite. Repeat for each group.

It does a number of things:
Cancel all invoices. Resolve all support requests. Ban the account. Add a note indicating why the account was voided. Void or refund all transactions. Cancel all billing agreements. Cancel all purchases. All of these are elective, so you decide what happens when you void an account.

What kind of icon? You can include really any HTML in there - for your prefix, you would either do this, for an actual image:
<img src='/path/to/image.png' alt='Group Name'><span style='color:white; background:#cd7f32; font-weight: bold; padding: 3px 8px; border-radius: 3px; text-shadow: #000 2px 2px 4px ;'> Or for a Font Awesome icon, you would do this (in this case, you can also control the color - if you want it to match the rest of the group name, then you would place it inside the span rather than outside):
<i class='fa fa-ICON'></i><span style='color:white; background:#cd7f32; font-weight: bold; padding: 3px 8px; border-radius: 3px; text-shadow: #000 2px 2px 4px ;'>  

A fix for this should be forthcoming in 4.5.2.

Yes, it is still valid.

In your Content model, do something like this:
/** * Do Moderator Action * * @param string $action The action * @param \IPS\Member|NULL $member The member doing the action (NULL for currently logged in member) * @param string|NULL $reason Reason (for hides) * @param bool $immediately Delete Immediately * @return void * @throws \OutOfRangeException|\InvalidArgumentException|\RuntimeException */ public function modAction( $action, \IPS\Member $member = NULL, $reason = NULL, $immediately = FALSE ) { if ( $action === 'delete' ) { $immediately = TRUE; } return parent::modAction( $action, $member, $reason, $immediately ); }