1.6.4.3 released

Use MDIUtilities 1.2.44
Use jEditor 1.2.13
Fix a What Links here typo
Don't write a category if it is empty
Avoid to write an empty line after a condition
Add new highlighting syntaxes names
Fix the URLExceptions file parsing which would not emit errors if the file was not valid
Fix the timeouts file parsing which was incorrect
Add a new "background" attribute for code, pre, and source elements to specifically set a default background on an element
Allow to redirect the index.html page to the page for one specific article
Add the "notesTwoColumns" property to put the notes chapter on two columns
The error messages are now stored in a properties file
Fix the text of many error messages
Add the fixedLayout attribute to the table element
Improve the margin around pre elements
Fix some cases where an empty line in the middle of a sentence was not showing
Improve the automatic adding of empty lines in the wiki output
Allow to group image definitions and resource definitions in categories
Add the "strongShadow" value for the border attribute
Add some warnings which are only shown if the showWarnings option is set
Support the JDK 20 Java API
Improve the creation of automatic disambiguation articles