Bug Fixes #11925. Form.parameter.downloadButton might contain now all...

Bug Fixes #11925. Form.parameter.downloadButton might contain now all parameter, incl. d, G, ... . KeyValueStringParser::explodeEscape() has been refactored. Function Link->paramPriority() has been renamed/rewritten to Link->paramPreparation(): double fire of explode() eliminated, code should be more efficient. Several new/enhanced unit tests.
3 jobs for B11925downloadButtonParameterFilename in 4 minutes and 9 seconds