Add Missing code inside "framework/addon.precheck.php" (ticket #798).Changes inside "upgrade-script" to avoid "mysql_list_tables is deprecated" warnings (ticket #800).Add "global $admin" to the install.php of the droplets-module to avoid (variable isn't declared) warnings. (ticket #800).
Created 2.8.x branch
VersionCompare inside addon.precheck.inc.php use a new function to avoid conflicts within wrong results comparing versionnumbers/-strings.Also remove PHP-Code inside "calender-system.css" (line 36) .
Added reload option to Add-on section and removed Admin tool reload
fixed wrong redirect path and added Id tag
Added option to perform pre-installation checks to test requirements of Add-Ons