MDL-42953 Themes: Fixing CSS for headers of central blocks
MDL-33763 notes: Fix issue with incorrect node highlighting in the nav tree
MDL-44098: Late submissions with extension calculate period of lateness incorrectly
MDL-44620 behat: Automates MDLQA-6

- MDLQA-6: By default, a new course contains a news
forum in which only teachers can post and subscription
is forced
MDL-44620 behat: Automate MDLQA-7

- MDLQA-7: By default, a new course contains a Latest
News block which displays a specific number of recent
discussions from the news forum
MDL-18162 mod_forum: Correct phpdoc for forum_clean_search_terms
MDL-45560 report_log: Close sessions before download only

If the session is closed too early, then preferences made in the body of
the page will not be saved to the session.
MDL-45592 mod_feedback - unwanted linebreak after import or duplicating a feedback
MDL-45333 output: navbar is now wrapped in a <nav> tag
MDL-45726 SCORM: Correct check for forcenewattempt
Automatically generated installer lang files
Automatically generated installer lang files
MDL-45781 quiz autosave: detect and report when the session is lost.

and also other errors.
MDL-35514 mod_forum: Fixed warning message to students in forums with groups
MDL-45763 question Random qtype should use '0' or '1' question text.

Some time ago, it when from using '0' for no-subcategories to blank.
Change to properly define '0' or '1', update old questions, and make
sure to fix newly restored questions.

Conflicts:
	mod/quiz/editlib.php
	question/type/random/version.php
Merge branch 'MDL-33763-26' of git://github.com/ankitagarwal/moodle into MOODLE_26_STABLE
Merge branch 'm26_MDL-45726' of https://github.com/danmarsden/moodle into MOODLE_26_STABLE
MDL-45714 backup: Less aggressive removal of old backup dirs

The old 4 hour standard was too aggressive and can cause backup files
to be removed while they were still in use. Now the same as cron,
1 week.
Merge branch 'MDL-18162-26' of git://github.com/andrewnicols/moodle into MOODLE_26_STABLE
MDL-42782 usability: fix for extreme course page indenting