Problem/Motivation
The two comment admin pages (Published comments and Unapproved comments) have filters to but the button is labeled "Apply" which is the default option of Views.
Since the only exposed action is to filter, the button should be labeled "Filter", as it is also the case on the Content and Files pages.
Image may be NSFW.
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Proposed resolution
Reword the label to Filter
Remaining tasks
Reword the label to Filter in both Views displays.
User interface changes
This is a UI text change that follows an establish pattern.
API changes
None.
Data model changes
None.