MDL-45045 block theme: Fake blocks show empty region when editing and clicked.
MDL-43145 dock: fixed up region_completely_docked code to ignore empty regions
MDL-43145 dock: Enable regions before the drag operation starts
MDL-43673 wiki: verify page tags work as expected

This covers MDL-43109, verifying that saved tags
are available on re-edition of a page, without any warning/error.

Also official tags are verified to be working ok. With support
for multiple options added by MDL-43713 and MDL-43738.
MDL-45012: Enable support for wma files within tinymce Moodle Media plugin
MDL-45037 gradebook: Allow dashes in xml grade values to be ignored.

This was delivering an error message when trying to import an exported
xml file (from Moodle).
MDL-44270 files: handle drag-drop js error when event has null types

This can happen when the 'dragover' event fires as has been observed
in Safari. When the dataTransfer.types property of the event is null,
accessing types.length throws a JavaScript error.
MDL-45118 shibboleth: set context on index page
MDL-42761 badges: Remove H2s from help popup
MDL-45138 Conditional availability: toggling AND/OR affects nested groups
MDL-41185 events: Added events for different course view pages
MDL-41185 cleanup course viewed events

Thanks Marina for spotting some of the issues.
MDL-45205 backup: avoid oracle incompatible query

Instead of aliasing column name with sql, use the backup API.
Merge branch 'MDL-45205-master-option2' of git://github.com/danpoltawski/moodle
Merge branch 'MDL-45138-master' of https://github.com/sammarshallou/moodle

Conflicts:
	availability/yui/build/moodle-core_availability-form/moodle-core_availability-form-min.js
Merge branch 'MDL-42761-master' of git://github.com/FMCorz/moodle
Merge branch 'MDL-45118-shibboleth-login-warning' of https://github.com/mpetrowi/moodle
Merge branch 'MDL-44270' of git://github.com/jonof/moodle
Merge branch 'wip-MDL-45037-master' of git://github.com/abgreeve/moodle
Merge branch 'mdl45012-master' of https://github.com/tlock/moodle