This patch overrides the maintenance renderer in the bootstrapbase
theme in order to override the notification method in the same way
we override the core renderer notification method.
This ensures now that clean is standard that notifications during
maintenance tasks (install, upgrade etc) look pretty.

1. Changed the 'delete' and 'eye' buttons to use an <a> link
tag so that it works without custom tabindex and shows a correct
mouse cursor. This also reduces the code slightly.

2. Changed the Cancel button on the dialog to use the mdl-align
class which is used in Atto dialogs. This results in the button
being centered, consistent with those dialogs.

This reverts commit 05a7f9e7.

Adjusted position of alfresco select box; amended border/background application in base.

Conflicts:
	version.php

The use of $PAGE necessitates the $PAGE params to be set. Really
the url shouldn't be necessary for this scenario as its enforced for
things like redirects. But this is the quick fix to keep our logs
clean.

Yet again an instanceid is being passed instead of a cmid.

The only exception to this rule is the activity chooser which is allowed
24px.

Conflicts:
	lib/editor/atto/plugins/equation/yui/build/moodle-atto_equation-button/moodle-atto_equation-button-min.js

Some hosting providers have a requirement to prevent users making
modifications to the configuration of scheduled tasks as doing so may have
a negative impact not only on their own site, but also on the performance
of other sites (depending on host configuration). For example, if the
statistics or automated backup tasks were run every minute, this could have
a negative impact for other users).

I also fixed up a spelling mistake in the language pack (relatedobservers).