Notification of string changes

Author: Sara Arjona
MDL-81866 course: Improve workflow for reset course
The following changes have been done to improve the reset course:
- Reset course button moved to sticky footer. Select default and
deselect all buttons set as secondary and left at the end of the form
- Adjusted page layout to a standardized format, centering the form for
improving presentation and recolocating the Reset course button away
from the bottom-right corner
- Changed page layout to standard, to display the form centered and
avoid having the Reset course button in the right bottom corner
- Modal added before resetting a course, asking user for confirmation
- Reset course buttons displayed with danger styling, because they
remove information
- All sections are expanded by default
- Default options are selected by default


http://git.moodle.org/gw?p=moodle.git;a=commit;h=7402706c599583a3c3038a4e3eb3fd008c63cac3
http://github.com/moodle/moodle/commit/7402706c599583a3c3038a4e3eb3fd008c63cac3

+ 4.5 en [resetcourseconfirm,core]
+ 4.5 en [resetcoursewarning,core]
+ 4.5 en [resetinfo,core]
+ 4.5 en [resetinfoselect,core]