There was a problem with wiki pages in the HTML markup syntax. If they
contain a link and the link text has a URL in it, that URL was converted
into another link. But it was not correctly nested and it caused
additional troubles with filters (particularly the multimedia filter if
the URL was a video such as on youtube).
The solution here is similar to what we do in filters. We protect the
whole explicit link so that its content is not further parsed. That
prevents the inner URL to be converted into another link and the
explicit link has the full control.
Every backup and restore controller always need to call
to their ->destroy() method in charge of finalizing loggers,
closing file handlers and destroy some circular references.
This is specially important within unit tests, because
open resources cannot be reset between tests, causing problems,
specially within Windows that locks all those files.
When we want to delete all of the activities in a course we should
mark them as having a deletion in progress, as this makes them
unavailable to users immediately.
This should make it much less likely that a request to get a context
that does not exist should be made when a user accesses a page.
When deleting a course (especially one containing a large amount of
data) the course mod info cache could contain entries for deleted
activities for a signifcant amount of time making it possible that
users could see errors in Moodle.
If you try to visit a category where another user is deleting a
course the coursecat cache may not be fresh. This is because there
is a breif time where the course record will have been deleted,
while it is deleting other course information, before the event that
triggers the coursecat cache to be purged is fired.
When OBv2.0 support was added, the issuername and issuercontact
fields were changed to static.
In order to avoid confusion for the user, these fields shouldn't
be displayed for OBv2.0 or higher.
It seems that the HTMLSelectElement behaves slightly different on Linux
vs MacOS.
On Linux with Firefox 47 when selecting an option the
HTMLOptionElement is returned, whereas on MavOS the HTMLSelectElement
that the Option belongs to is returned.
We need to normalise the value here before resetting the currently
selected item.
* Applied proper styles of btn-secondary.
* Added some vertical spacing between the buttons by enclosing them in
divs with 'm-y-1' class instead of just a br tag.
