In the message "echo-notification-placeholder-filters", please change
"There are no notifications matching this criteria."
to
"There are no notifications matching these criteria."
Because "criteria" is plural, as reminded in https://en.wikipedia.org/wiki/Wikipedia_talk:Notifications#Correct_wording_in_Notifications
Change 304955 abandoned by Catrope:
Change "this" to "these" in echo-notification-placeholder-filters
Change 304957 had a related patch set uploaded (by Quiddity):
Changing "this" to "these" because it refers to plural criteria (filters)
Change 304957 merged by jenkins-bot:
Changing "this" to "these" because it refers to plural criteria (filters)