MDL-46302 correct atto img float right

Correct the atto image "float right" margin CSS
MDL-46457 mod_lti: Render lti description through standard format_module_intro
MDL-46414 Conditional availability: Dropdowns not set correctly when editing in IE

In IE, you cannot set the value of a dropdown to an integer; it has to be a string.
This caused a bug in several parts of the conditional availability editing
interface.
MDL-46620 messages Make sure full message is used for read marking

message_mark_message_read needs to have the full message object,
otherwise data will be lost.
MDL-46625 theme: Added a way to target the current page
Automatically generated installer lang files
MDL-46641 behat: Delete activity step does not work without actions menu open
Merge branch 'MDL-46620-27' of https://github.com/merrill-oakland/moodle into MOODLE_27_STABLE
Merge branch 'MDL-46414-m27' of git://github.com/sammarshallou/moodle into MOODLE_27_STABLE
Merge branch 'MDL-46457_27' of git://github.com/aolley/moodle into MOODLE_27_STABLE
MDL-44794 group: unit test for get_groups method.
MDL-44794 group: unit test for groups_get_user_groups method.
Merge branch 'MDL-44794-27' of git://github.com/lameze/moodle into MOODLE_27_STABLE
MDL-44149 Assign: Reopen attempts from quick grading (reopenuntilpass)
Merge branch 'MDL-44149-27' of git://github.com/damyon/moodle into MOODLE_27_STABLE
MDL-46552 session: add support for multiple servers in memcached session driver
Merge branch 'MDL-46641_27-delete-activity-step' of https://github.com/rlorenzo/moodle into MOODLE_27_STABLE
MDL-46315 themes: Fixed display inconsistancy with help modals
Merge branch 'm27_MDL-46625' of https://github.com/totara/moodle into MOODLE_27_STABLE
MDL-46643 calendar: improved tab order of calendar detail pages