MDL-35638 backup: Do not print headers during redirects
MDL-47648 admin unit tests: fix file perms on mimetex.exe

This was causing the
core_admintree_testcase::test_admin_setting_configexecutable unit test
to fail.
MDL-47618 quiz statistics: fatal error with groups.

The problem was that the names of query placeholders were changing. The
fix was to do things ourself, rather than using get_in_or_equal.
MDL-48115 badges: Fix strtoupper() output in badges

Signed-off-by: Yuliya Bozhko <yuliya.bozhko@totaralms.com>
MDL-42756 dock: Trigger actionmenu enhance when showing dock panel

Additionally fixes the styling for the actionmenu icon size in
bootstrapbase'd themes.
MDL-48194 testing: Adjust naming of testsuites in phpunit.xml

This will make it easier to run phpunit for a specific component by making
all testsuite names consistent, guessable, and in-line with the naming of
the parameter (testsuite vs. test suite).
MDL-33606 course: Adding section info to course_viewed log
MDL-48146 quiz settings: fix non-percent feedback boundaries
MDL-48196 phpunit: Set e-mail address for admin user at installation
MDL-47700 Grades: Sitewide overview report isn't visible in some cases

Showing a overview report rank sitewide isn't visible to student in same cases
MDL-47700 Grades: Fix incorrect config for overview report showrank
MDL-46865 report_log: Fixed showuser and showcourse in report log
MDL-44657 forms: Form identifiers should only contain basic characters
MDL-47993 calendar: Fix ical import Microsoft calendar issue
MDL-48206 block_comments: textarea width 100%
MDL-47590 question backup: include response file only with userdata
MDL-48179 Backup progress: Can time out when compressing large backup
MDL-48042 Questions: Reset Calculated qtype comments on datasets

Reset back the modifications of Calculated qtype comments on datasets
    done by MDL-47224

Signed-off-by: Pierre Pichet <pichet.pierre@uqam.ca>
MDL-48023 Files API: Theme files must be cache-able by shared proxies.

The profile image AKA user icon will be cache-able by shared proxies too,
under its specific accessibility constraints/conditions.
Merge branch 'MDL-44657-27' of git://github.com/FMCorz/moodle into MOODLE_27_STABLE