MDL-44669: mod/assign: fix batchoperations JS when using select all checkboxes.
MDL-29572 Grade Import: Avoid creating invalid temporary rows; Provide feedback on error
Merge branch 'MDL-29572_moodle26' of https://github.com/jrchamp/moodle into MOODLE_26_STABLE
Merge branch 'mdl44669-moodle26' of https://github.com/tlock/moodle into MOODLE_26_STABLE
MDL-42195 Bootstrap: Make selector for responsive images 100% the same as bootstrap3.

Conflicts:
	theme/bootstrapbase/style/moodle.css
MDL-42462 mod_feedback: added $OUTPUT to list of global variables used to avoid error
MDL-40843 chat: fixed bug in SQL query in recent activity block