Author: Mark Nelson
MDL-63210 core: touch-up after review
1. Reworded the string.
2. Removed logic handling form data.
3. Do not use window.location.replace.
Backport of MDL-54551.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a456850616af7fe6a8c37f21fac47bebcf6cfa7e
http://github.com/moodle/moodle/commit/a456850616af7fe6a8c37f21fac47bebcf6cfa7e
+ 3.4 en [servicerequireslogin,core_webservice]