Add site setting for default MNet host
Removing unused file download function

I think this was just left over from the initial version of this
plugin being copied from the "file" assignsubmission plugin.
Change the "default on" setting to "off"

Also change the name of the lang strings for it to be a bit more
specific
Lang string cleanup

Change this lang string to match the naming pattern for the other error
lang strings (and to fix the alphabetical order in the lang file)
A little cleanup of the "host" setting
Allow teacher to see draft pages

... since that's how other draft submission types work
Add ability to keep pages unlocked in Mahara
Bug: The "Mahara" section header goes away when there are no pages to select
Correct the spelling of "mnet_release_submited_view()"