Fixed WEB-13982 Incorrect indentation on pressing Enter after XML tag with attributes on multiple lines
(cherry picked from commit 0033d53) [CR-IC-6718]
Do not indent children of top level XML/HTML document (fixes WEB-392 HTML always auto-indenting if no parent tag and WEB-541 (X)HTML and body indentation)
(cherry picked from commit d27edce) [CR-IC-6722]