Log Message:
Update contao43 to 4.3.3.

 * Correctly handle nested public folders when symlinking a folder.
 * Correctly handle SVGZ files in the file manager (see contao/core#8624).
 * Prevent an endless redirect loop if the page alias is "/" (see \ 
contao/core#8560).
 * Correctly parse German dates with two digit years in MooTools (see \ 
contao/core#8593).
 * Correctly add new resources to the user/group permissions (see contao/core#8583).
 * Trigger the auto-submit function in the date picker (see contao/core#8603).
 * Call the load callback when loading page/file picker nodes (see contao/core#7702).