Fix Sending Wrong Values on Failed Conversion to DPT#300

thelsing merged 11 commits intothelsing:masterthelsing/knx:masterfrom

cornelius-koepp:fix/group-object-setting-invalid-value--thelsing/mastercornelius-koepp/knx--stack--thelsing:fix/group-object-setting-invalid-value--thelsing/masterCopy head branch name to clipboard