Only able to filter course participants by first and last initial in languages using A-Z alphabet

Setup

1. Make sure you have a course with some enrolled users.
2. Create or rename users so you have the following enrolled in the course:

   First name	Last name
   Darrell	Abbott
   Vincent	Abbott
   Rex	Brown
   המורה	טרי

1. Log in as admin and install the Hebrew language pack (_עברית ‎(he)‎‎_) via Site administration > Language > Language packs.
   Note: Keep the site set to English for the time being.

Testing - English

1. Navigate to the Participants page in the course.
2. CONFIRM all users enrolled in the course are visible and the first name and surname filters are set to "All".
3. Select "D" in the first name filter.
4. CONFIRM the participants list now contains only users beginning with D (including Darrell Abbott).
5. Select "A" in the Surname filter.
6. CONFIRM the participants list now contains only Darrell Abbott (and any other users you have that may have the initials DA).
7. Select "All" in the first name filter.
8. CONFIRM the participants list now contains only users with surname beginning with "A" (including both Darrell and Vincent Abbott).
9. Add "&tifirst=v&tilast=a" to the end of the current page URL and press enter.
10. CONFIRM when the participants page reloads, only Vincent Abbott is visible (and any other users that have initials VA).
11. Remove "&tifirst=v&tilast=a" from the end of the current page URL and press enter.
12. If the first name or surname filters are not set to "All", update them to that value.
13. The participants page should now be loaded with no filtering in place.

Testing - RTL non-English characters (Hebrew)

1. Select Hebrew (he) from the language dropdown at the top of the page.
2. CONFIRM you now see the RTL version of the participants page, with all enrolled users listed.
3. In the first name filter (שם פרטי), select the "ה" character (it should be the fifth one from the right of what is already selected).
4. CONFIRM the participants list now only contains the user you named המורה טרי during setup.
5. Change the first name filter to another letter and CONFIRM you now see no users listed.
6. Return the first name filter to the all option (the הכל option on the far right of the filter).
7. CONFIRM all participants are again listed.
8. In the surname filter (שם משפחה), select the "ט" character (it should be the ninth one from the right of what is already selected).
9. CONFIRM the participants list now only contains the user you named המורה טרי during setup.
10. Change the surname filter to another letter and CONFIRM you now see no users listed.
11. Return the surname filter to the all option (the הכל option on the far right of the filter).
12. Add "&tifirst=ה&tilast=ט" to the end of the current page URL and press enter.
13. CONFIRM when the participants page reloads, only the user you named המורה טרי during setup is visible.