Switch array position of purchasing and payables in MainMenuLinksArray.php

[agaluski]

includes/MainMenuLinksArray.php needs a minor change

Old:
$ModuleList = array(_('Sales'),
_('Receivables'),
_('Purchasing'),
_('Payables'),
_('Inventory'),
_('Manufacturing'),
_('General Ledger'),
_('Asset Manager'),
_('Petty Cash'),
_('Setup'),
_('Utilities'));

New (Change position of Payables and Purchasing to match WWW_Users.php):
$ModuleList = array(_('Sales'),
_('Receivables'),
_('Payables'),
_('Purchasing'),
_('Inventory'),
_('Manufacturing'),
_('General Ledger'),
_('Asset Manager'),
_('Petty Cash'),
_('Setup'),
_('Utilities'));