LPS-34634 don't show message above files for single uploader
LPS-34634 move messages to the constructor since otherwise they don't work anymore
LPS-34634 improve visualization of error messages
LPS-34634 move label to the body of the importer
LPS-34634 improve look and feel of uploader
LPS-35476 emphazise the name of the file
LPS-35476 - Source formatting
LPS-35476 3 or less use +, more than 3, use SB
LPS-35476 Lang keys