Automatically generated installer lang files
MDL-44084 behat: Fixed setting value for form editor
MDL-43883 Behat: Fix deprecation and move custom matches to the editor field only.
MDL-43883 Fix wiki behat tests to work with Atto
Merge branch 'install_master' of git://git.moodle.org/moodle-install
NOBUG: Fixed SVG browser compatibility
NOBUG: Fixed file access permissions
weekly release 2.7dev
MDL-44759 atto_undo: Buttons are only enabled when needed

Before the patch it was happening that the undo or redo buttons
were enabled even though clicking on them didn't produce anything.
This is partly because we were not storing the initial value, we
allowed for the stack to be empty, and we were using not clean
HTML.