Creatio 2: Minor styling updates. (#7420)

* Update screenshot.png

* Remove font-size reference on block level.

* Update theme.json

Remove explicit reference to font family.

* Remove block-level styling

* Update header.html

Remove fixed background color.

* Update single.html

Remove the block-level color setting for post navigation.

* Update theme.json

Simply how colors are applied to blocks.

* Update theme.json

Add styling for comments count and comments link blocks.

creatio-2/theme.json

@@ -388,6 +388,16 @@
 					"fontSize": "var(--wp--preset--font-size--x-small)"
 				}
 			},
+			"core/post-comments-link": {
+				"typography": {
+					"fontSize": "var(--wp--preset--font-size--x-small)"
+				}
+			},
+			"core/post-comments-count": {
+				"typography": {
+					"fontSize": "var(--wp--preset--font-size--x-small)"
+				}
+			},
 			"core/post-title": {
 				"color": {
 					"text": "var(--wp--preset--color--foreground)"