Warnings tell the user about circumstances to consider, such as the risk of overwriting an existing article. If the user is already aware of the situation and makes a decision (e.g., overwrite the existing content) it does not make sense to continue showing the warning forever since it can distract from other more relevant warnings.
In order for users to discard warnings we want to provide a "Mark as resolved" action to most of the warnings (at least those where we cannot provide a quick action to fix them).
This was part of the general spec for issues (T189488) and specific cases such as T190038, but currently not supported (illustrated below) since it requires additional effort to store the status for the marked warnings.
