Fixed JavaScript compression. The compressor did not recognize a regular expression after a '&&' ot '||' operator. So it could happen that code had been cut off if the regular expression included '\//' (which was treated as a single line comment because of the regular expression not being recognized). Finally fixes #897.

Originally AUTH_USER_CHANGE handler could modify the user data, however,
auth plugin consequently worked with different copy of the array thus
effectively preventing any changes by the AUTH_USER_CHANGE implementer.

Otherwise comments are never visible in css.php

1 typo

Microfix

remove config option

This request makes "Your last update" of the extension info shown when
clicking more info triangle mark. The first installed date of the
extension may not be necessary for local site admin work.