MDL-38702 theme_mymobile: Replaced missing theme setting to disable CSS Optimiser.

The missing setting was a regression casued by MDL-33357.
MDL-38112 - update to the ISO list of countries

According to ISO 3166-1
MDL-38700 course: add tests for moveto_module()

* Test visibility when moving around hidden sections
* Test for visiblity changes when moving around in the same sections.
MDL-38700 course: only change visibility if a module moves to a different section
MDL-38703 course: moving a hidden course module unhides it

When moving to a non-hidden section because visibleold was not
being correctly set. visibleold should only be differnet from visible
when a CM is changed by section visibility
MDL-38703 course: backport visibility tests from MDL-36417
MDL-38713 course: correctly set visibleold on mod creation

Remove uncessary set of visibleold in the form
MDL-35603 - Backup - Course import/restore max results

* Unified UI for import and restore course search
MDL-38809 quiz manual grading: delete expensive unnecssary code.
MDL-38657 theme_base: fixes misalignment issue in User Report page.
Merge branch 'MDL-38702_M23' of git://github.com/lazydaisy/moodle into MOODLE_23_STABLE
Merge branch 'MDL-38700-23' of git://github.com/danpoltawski/moodle into MOODLE_23_STABLE
Merge branch 'MDL-38703-23' of git://github.com/danpoltawski/moodle into MOODLE_23_STABLE
Merge branch 'MDL-38713-23' of git://github.com/danpoltawski/moodle into MOODLE_23_STABLE
Merge branch 'MDL-35603_23' of git://github.com/rlorenzo/moodle into MOODLE_23_STABLE
MDL-35603 backup: fix coding style issues

Conflicts:
	backup/util/ui/restore_ui_components.php
Automatically generated installer lang files
Merge branch 'MDL-38809_23' of git://github.com/timhunt/moodle into MOODLE_23_STABLE
Merge branch 'MDL-38657_M23' of git://github.com/lazydaisy/moodle into MOODLE_23_STABLE
Merge branch 'MDL-38112-23' of git://github.com/danpoltawski/moodle into MOODLE_23_STABLE