1.3.28

*** 1.3.28 (Martin Hecht: 08-Feb-2019) ***
for fraggy: put table captions above the tables in the settings table (thanks to ice)
add required option to required date fields (thanks to jacobi22)
add an advanced option if upload of multiple files per field is allowed (feature request by Hansi)
correct URLs that use icons (thanks to jacobi22)
add a fallback for SCRIPT_NAME in case this is not set