match wording to sound list title
This is a leftover from !393 (merged). The title of the sound list page has been changed to "Message sound". So this MR does match this wording in the main sound page.
Before:
After:
This is a leftover from !393 (merged). The title of the sound list page has been changed to "Message sound". So this MR does match this wording in the main sound page.
Before:
After: