Do not collapse an initial QDoc comment

Qt Creator automatically collapses the first comment in a newly opened file. This is correct in most cases, since this comment usually contains only copyright information. But there is one case where this behavior is always annoying: This are the .qdoc files, which syntactically consists of one big comment and are therefore completely collapsed when they are opened.

I therefore suggest that if the first comment in a file begins with /*!, it shall not be collapsed.