MDL-46457 mod_lti: Render lti description through standard format_module_intro
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.
Automatically generated installer lang files
Merge branch 'MDL-46620-26' of https://github.com/merrill-oakland/moodle into MOODLE_26_STABLE
Merge branch 'MDL-46457_26' of git://github.com/aolley/moodle into MOODLE_26_STABLE
MDL-44794 group: unit test for groups_get_user_groups method.
MDL-44794 group: unit test for get_groups method.
Merge branch 'MDL-44794-26' of git://github.com/lameze/moodle into MOODLE_26_STABLE
MDL-44149 Assign: Reopen attempts from quick grading (reopenuntilpass)

Conflicts:
	mod/assign/locallib.php
Merge branch 'MDL-44149-26' of git://github.com/damyon/moodle into MOODLE_26_STABLE
MDL-46625 theme: Added a way to target the current page
Merge branch 'install_26_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_26_STABLE
weekly release 2.6.4+
Merge branch 'MOODLE_26_STABLE' of ssh.github.com:ruddj/moodle into sbhs_26