MDL-42184 bootstrapbase: popup should have no header
MDL-42774 JavaScript: Ensure that shifter cleans build directories before running
MDL-42100 tool_capability: fixed incorrect links
MDL-42853 frontpage: RTL alignment to match LTR
MDL-42853 course: Fix edit title icon margin on RTL
MDL-42553 core_calendar: third party calendar types can now be uninstalled
MDL-42905 Backup progress: Pointless line of code should be deleted
MDL-42504 quiz autosave: alert users if connection lost.

When the auto-save fails, we alert the user that they may have lost their
internet connection so that they don't do more work that they might just
lose.
MDL-42863 make capabilities overview more fault-tolerant.
MDL-42865 Make XMLDB foreign key check more robust.

Otherwise, installing one bad add-on can completely break this report.
MDL-42181 quiz nav: highight all buttons when all Qs on one page
MDL-42852 lib: Blocks disappear in Clean in RTL.
MDL-42060 block_course_list: fixed sorting of mycourses
MDL-42850 administration: Updated bulk user upload errors to be more descriptive.
MDL-42612 add support for Russian Ruble in PayPal
Merge branch 'MDL-42100_master' of https://github.com/markn86/moodle
Merge branch 'MDL-42853-master' of git://github.com/FMCorz/moodle

Conflicts:
	theme/bootstrapbase/style/moodle.css
Merge branch 'MDL-42184-master-3' of git://github.com/mouneyrac/moodle
Merge branch 'wip-MDL-42852_master' of git://github.com/gjb2048/moodle

Conflicts:
	theme/bootstrapbase/style/moodle.css
MDL-42852 theme_bootstrapbase: fixed whitespace