- fix undefined index in customer_domains.php

- add possibility to disable form-buttons if not needed
- corrected ticket-categories order-counter begin-value
- beautify domains-add and e-mail add form for customers
- added various missing hidden-fields in templates (Classic-theme)

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>

templates/Froxlor/customer/email/emails_edit.tpl

@@ -15,15 +15,10 @@ $header
 
 				<table class="formtable">
 					{$email_edit_form}
+					<tr>
+						<td class="maintitle" colspan="2"><a href="$filename?page=emails&amp;s=$s">Back to overview (@TODO lng)</a></td>
+					</tr>
 				</table>
-
-				<p style="display: none;">
-					<input type="hidden" name="s" value="$s" />
-					<input type="hidden" name="page" value="$page" />
-					<input type="hidden" name="action" value="$action" />
-					<input type="hidden" name="id" value="$id" />
-					<input type="hidden" name="send" value="send" />
-				</p>
 			</fieldset>
 		</form>