MDL-40674 - Main menu's "sub menu" should open to the left in RTL mode (theme/clean , bootstrapbase)
Merge branch 'MDL-40674_M25' of https://github.com/nadavkav/moodle into MOODLE_25_STABLE

Conflicts:
	theme/bootstrapbase/style/moodle.css
MDL-44908: Fix upgrade_grade_item_fix_sortorder performance
weekly release 2.5.5+