[charcoal/admin] Add support to customize sender email address

[mcaskill]

By default, it should inherit from the application configset's email.default_from.

charcoal/packages/admin/src/Charcoal/Admin/Action/Account/LostPasswordAction.php

Lines 250 to 253 in c72eca8

	$from = [
	'name' => 'Charcoal',
	'email' => 'charcoal@locomotive.ca'
	];