Add ability to generate passwords for new mailboxes

data/web/css/mailbox.css

@@ -30,3 +30,4 @@ table.footable>tbody>tr.footable-empty>td {
 .inputMissingAttr {
   border-color: #FF4136;
 }
+

data/web/js/mailbox.js

@@ -20,6 +20,15 @@ $(document).ready(function() {
     auto_fill_quota($('#addSelectDomain').val());
 	});
   auto_fill_quota($('#addSelectDomain').val());
+
+  $(".generate_password").click(function( event ) {
+    event.preventDefault();
+    var random_passwd = Math.random().toString(36).slice(-8)
+    $('#password').prop('type', 'text');
+    $('#password').val(random_passwd);
+    $('#password2').prop('type', 'text');
+    $('#password2').val(random_passwd);
+  });
 });
 
 jQuery(function($){

data/web/modals/mailbox.php

@@ -50,6 +50,7 @@ if (!isset($_SESSION['mailcow_cc_role'])) {
             <label class="control-label col-sm-2" for="password"><?=$lang['add']['password'];?></label>
             <div class="col-sm-10">
             <input type="password" class="form-control" name="password" id="password" placeholder="" required>
+            (<a href="#" class="generate_password">Generate</a>)
             </div>
           </div>
           <div class="form-group">