Notification of string changes

Author: Jun Pataleta
MDL-78983 core: Preserve default behaviour of flipping question icon
Introduce a lang string `questioniconfollowlangdirection` that will
allow the current behaviour of displaying the question mark icon
in RTL languages in the same manner as the current language.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=88459bba94d3c4eb0174958cb4ca05e98f33973c
http://github.com/moodle/moodle/commit/88459bba94d3c4eb0174958cb4ca05e98f33973c

+ 4.1 en [questioniconfollowlangdirection,core_langconfig]
- 4.1 en [questionicondirection,core_langconfig]