DragnDrop Upload text style

The 8px margin was uggly.
Do not show exception to the end-user

Log the error instead of potentially leaking sensitive information
replace horizontal rules with whitespace
fix error message template
Fix AmazonS3 rmdir on the root
Fix amazon s3 rename overwrite
Fix copy overwrite for amazon s3
Skip test for unsuported feature for amazon s3
Inject config into checkserver and cleanup tests
Don't complain about non-writable datadirs before we're installed
Check for writable datadir during setup
Don't test for htaccess if we cant write into the datadir anyway
fix retrievel of group members and cache group members
send browsers timezone back tp the server on login
date printed in the admin section regarding last execution time is already displayed in the users timezone - no need to append UTC
enhance formatDate function to accept an optional argument containing the time zone
group shares and combine permissions
unit tests for grouping of shares pointing to the same source
correct delete-icon to icon-delete, fix #11128
correct progress-icon to icon-loading-small