MDL-45483 mod_forum: corrects values for maxattachments in forum settings
MDL-45514 behat: Fixed should_not_exist timout param
MDL-45380 theme_bootstrapbase: Restore config override highlight
MDL-45496 core Added space to logged in as line
MDL-45130 editor_atto: Remove debugging messages for missing plugins

This is no longer required as the toolbar configuration prevents
missing plugins from being set. However, even if we do not output
any notice, we ignore missing plugins to prevent errors in case
one was uninstalled but left in the editor toolbar.
MDL-44953 theme_more: Removing odd-looking text-shadow
MDL-45522 quiz Check that sumgrade is valid before saving.
MDL-45523 quiz Cleanup duplicate question instances.
MDL-37838 block_courseoverview: fix pluaralisation logic

Note that this kind of handling of plurals is extremely limited, see:

https://moodle.org/mod/forum/discuss.php?d=85897
http://search.cpan.org/~petdance/Locale-Maketext-1.12/lib/Locale/Maketext/TPJ13.pod

However, this is a simple fix to the existing logic
Merge branch 'MDL-45522_m27' of https://github.com/merrill-oakland/moodle into MOODLE_27_STABLE
Merge branch 'MDL-45523_m27' of https://github.com/merrill-oakland/moodle into MOODLE_27_STABLE
Merge branch 'MDL-41383-27' of git://github.com/jethac/moodle into MOODLE_27_STABLE
MDL-44027 groups: remove some junk html
MDL-45474 atto_undo: Remove notice when undo stack is empty
MDL-41383 theme: filepicker zoom resiliency (base)

Fixed an issue that broke the file picker on base when initial zoom level is less than 100%.
MDL-45545 csslib: Chunking handles commas in media query definitions
MDL-45546 mod_forum: Login the user before getting its context
MDL-36670 logging: action parameter length restricted to 40 chars
MDL-45477 Behat: List of steps takes too long to load, times out

Increase time limit to 300 seconds (5 minutes).
MDL-45550 Conditional availability: Missing lang string for save settings error