Add document.scripts
Fix typo
Improve autocompletion for <hbox>: add "align" attribute
Additional shortcuts for <?xml-stylesheet ...?>
Improve autocompletion for <dialog>: add some frequently used attributes
Improve autocompletion for <prefwindow>: add some frequently used attributes
Improve autocompletion for <window>: add title attribute
Add autocompletion for <commandset> and <command>
Add autocompletion for <keyset> and <key>