1.6.4.10 released

Use MDIUtilities 1.2.52
Use jEditor 1.2.14
Use jDependency 1.4.4
Move development to Netbeans 12.5
Fix some cases where the parsing of the content of a plain pre element did not see the last line of the content
Fix the parsing of plain pre elements not taking account of the charset
Fix the writing of resources in the help format
Fix the writing of some kinds of syntax pre in the help format which did not honor the new lines