Privacy: Replace intrusive policy update notice with menu bubbles.

Previously, when a plugin updated its suggested privacy policy text, an admin notice was shown on all screens in the Administration Panels. That was done in order to make sure that administrators were aware of it, so that they could update their policy if needed. That was a very heavy-handed and intrusive approach, though, which leads to a poor user experience, and notice fatigue. 

An alternative approach is to use bubble notifications in the menu, similar to when plugins have updates that need to be installed. That still makes it obvious that something needs the administrator's attention, but is not as distracting as a notice.

The notice will still appear on the Privacy page, though, since it is relevant to that screen, and provides an explanation of why the bubble is appearing.

Props azaozz, xkon, iandunn.
Fixes #43954. See #43953.


git-svn-id: https://develop.svn.wordpress.org/trunk@43223 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/forms.css

@@ -1089,7 +1089,7 @@ table.form-table td .updated p {
 }
 
 .tools-privacy-edit {
-	margin: 2.3em 0;
+	margin: 1.5em 0;
 }
 
 .tools-privacy-policy-page span {