Fix _getPossibleIndirectDbIdShortcuts, delivered too many shortcuts
menuDropdown/Url in Kwc_Newsletter/-Category will now be created with menuConfigs, not admins any more
optimized newsletter overview

no more deleting, duplicating only adding is allowed
removed editDialog and show only one button with text
added tabPanel settings var for better extending of Kwf_js/Binding/TabPanel

this settings will be applyed to the tabpanel
added own preview tab for newsletter system

shows html/text preview of newsletter
switch between newsletter subscriber for preview
send test preview newsletter to any email for any subsriber
using new tabpanel for newsletter system

now a prev/next button in the bbar will be shown to easily switch between tabs
adding trackingPixel to Kwc/Mail/Abstract

tracks views of mail if user shows all images
added this tracking evaluation to newsletter statistic
fix acl cache: correctly serialize resource
previewPanel for Kwc/Newsletter/Detail is own Tab
deleted setting mailsPerMinute for Kwf/Controller/Action/Cli/Web/NewsletterController.php and added it to newsletter

can be edited in backend now
deleted mailing panel in Kwc/Newsletter/Detail and created startNewsletterPanel

this contains the progressbar for sending mails with some new features:
-> shows speed of newsletter sending
-> shows remaining time for the mails to send

added new startNewsletter button which can configure the sending start time and sending speed of the newsletter
new possibilty to add Recipients to newsletter/queue and start the newsletter

panel recipients show at left side all possible recipients which can be added to queue,
and on the right side you will see the current queue of recipients for sending

on the bottom the new StartSendingPanel is placed where the newsletter can be started