Accessibility: Improve the Comments and Privacy count text.

- standardizes the Comment count string to `%s Comment in moderation', '%s Comments in moderation` so it can be bulk-updated
- adds the string as visually hidden text in the admin menu 
- introduces an `updateInModerationText` JS simple function, responsible to correctly update all the related text using the data from the AJAX response
- adds a visually hidden text "1 Privacy Policy update" to the Privacy menu items count
- adds/improves translators comments

Changes that apply to all the count bubbles (Updates, plugins, etc.)
- makes the bubbles and their text slightly bigger
- improves the active menu item bubble contrast by changing the background color to red (option 2 in the screenshot attached in a previous comment)

Props adamsoucie, afercia.
Fixes #33030.

Built from https://develop.svn.wordpress.org/trunk@44924


git-svn-id: http://core.svn.wordpress.org/trunk@44755 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/admin-menu-rtl.css

@@ -515,14 +515,15 @@ ul#adminmenu > li.current > a.current:after {
 #adminmenu .update-plugins {
 	display: inline-block;
 	vertical-align: top;
-	margin: 1px 2px 0 0;
+	box-sizing: border-box;
+	margin: 1px 2px -1px 0;
 	padding: 0 5px;
-	min-width: 7px;
-	height: 17px;
-	border-radius: 11px;
+	min-width: 18px;
+	height: 18px;
+	border-radius: 9px;
 	background-color: #ca4a1f;
 	color: #fff;
-	font-size: 9px;
+	font-size: 11px;
 	line-height: 17px;
 	text-align: center;
 	z-index: 26;
@@ -530,7 +531,7 @@ ul#adminmenu > li.current > a.current:after {
 
 #adminmenu li.current a .awaiting-mod,
 #adminmenu li a.wp-has-current-submenu .update-plugins {
-	background-color: #00b9eb;
+	background-color: #ca4a1f;
 	color: #fff;
 }
 

wp-admin/css/admin-menu.css

@@ -515,14 +515,15 @@ ul#adminmenu > li.current > a.current:after {
 #adminmenu .update-plugins {
 	display: inline-block;
 	vertical-align: top;
-	margin: 1px 0 0 2px;
+	box-sizing: border-box;
+	margin: 1px 0 -1px 2px;
 	padding: 0 5px;
-	min-width: 7px;
-	height: 17px;
-	border-radius: 11px;
+	min-width: 18px;
+	height: 18px;
+	border-radius: 9px;
 	background-color: #ca4a1f;
 	color: #fff;
-	font-size: 9px;
+	font-size: 11px;
 	line-height: 17px;
 	text-align: center;
 	z-index: 26;
@@ -530,7 +531,7 @@ ul#adminmenu > li.current > a.current:after {
 
 #adminmenu li.current a .awaiting-mod,
 #adminmenu li a.wp-has-current-submenu .update-plugins {
-	background-color: #00b9eb;
+	background-color: #ca4a1f;
 	color: #fff;
 }