MDL-44575: Prevent cron from sending feedback notifications when assignments are hidden in the gradebook
MDL-45046 output: reviewed standard/base layouts and converted where a better option was available
MDL-44991 Behat: step to check if attribute does not contain text

The step checks that an attribute exists, but doesn't contain the
specified text.

Example:
Then the "class" attribute of "#mydiv" "css_element" should
not contain "accesshide"
MDL-27459 Completion: When ratings off, disallow grade completion

For activities that use ratings, there is no grade unless ratings
are enabled. The completion system still lets you select 'complete
when user gets a grade', which leads to later errors.

This change simply disables the 'completion on grade' field if
ratings are enabled for the activity, but not turned on in the form.
MDL-45148 unit testing: pass role id instead of user id
MDL-45186 mod_quiz: Some RTL improvements on quiz edit page
MDL-45124 dndupload: Lowercase types when comparing

IE helpfull uses a mixed-case version of 'Text' which fails the string
comparison. All other browsers use lowercase for their mime-types.
MDL-44855 AJAX: Arrays and Objects should be defined in the initializer

JavaScript is a prototypal language and complex types should be defined as
null in the prototype, and set up in the initializer instead.
Automatically generated installer lang files
Merge branch 'MOODLE_26_STABLE' into install_26_STABLE
Automatically generated installer lang files
MDL-45172 block_completionstatus: added a check for an empty string before appending
MDL-45134 adminlib: No more validation error when a config file is not set

When the destination draft area existed and the user draft area has not
been used, and thus does not exist, an error was displayed to the user
saying that they could not save the setting.

This was intended to handle the cases where the draft area disappears
and would overwrite the content of the destination area, deleting
all its content. But now we do not prompt with an error when
overwriting empty with empty.
Merge branch 'MDL-44855-26' of git://github.com/andrewnicols/moodle into MOODLE_26_STABLE
Merge branch 'MDL-44991-m26' of git://github.com/sammarshallou/moodle into MOODLE_26_STABLE
Merge branch 'wip-MDL-45148-26' of https://github.com/mackensen/moodle into MOODLE_26_STABLE
Merge branch 'MDL-45134-26' of git://github.com/FMCorz/moodle into MOODLE_26_STABLE
MDL-45210: Fix broken link when plagiarism plugins are disabled
MDL-45075 mod_forum: Add unit tests for forum subscription on forum creation
Merge branch 'MDL-45075-26' of git://github.com/andrewnicols/moodle into MOODLE_26_STABLE