Merge branch 'master' of git.in.moodle.com:moodle/integration; branch 'MDL-35980-master' of git://github.com/snake/moodle

The DIALOGUE object was using Y.clone to copy the input config, messing
up the prototype chains for any objects in the config param. Really,
this doesn't need to clone the config, so I've refactored to avoid doing
so. Also moved some of the other attribute init and setup calls to the
appropriate places (initializer and modifyAttrs).

For each delete button in the comments widget, make the spoken text a
string containing the name of the poster and the datetime.

The initialisation of $commentschooser was moved into an IF condition,
whilst still using it outside of that IF conditions scope. As such, if
there are no comments to choose from, the variable is never init'd but
it still goes to use it, emitting a PHP notice.