Explore UI for destructive controls & contexts

[joedolson]

After considering ticket #49603, we think that WordPress should take a look at the consistency of informing users when they are in a destructive context and when a control will have destructive consequences.

In general, we have a standing expectation that these controls will be red & have text that clearly indicates the action to be taken, but this should be reviewed for consistency.

Reviewing #49603 showed that the 'Force Erase Personal Data' control is blue, which doesn't match expectations.

The intention of 49603 is to draw attention to the fact that the 'Erase Personal Data' screen is entirely dedicated to destructive actions. While using a background color to indicate this may not be the ideal choice, the concept is well worth exploring.

Summary: review destructive actions & contexts to ensure clarity and maximize error prevention.

[SergeyBiryukov]

Related: #36882.

Tangentially related: #11304, #27370, #28235, #37016, #39712.