[css] Remove bullet styling from "tab-nav" components. (#9020)

* [docs] Fix syntax formatting in HA-setup doc.

Attempts to fix an unformatted code block; whatever markdown parser is being used seems to have gotten tripped up, and as a result the inline `yaml` in the script is interpreted as bullet points... it looks [pretty yucky](http://jstu.art/sAjc). I'm wondering if this is something specific to the Hugo toolchain? Because GH itself recognizes the block as valid, even with the `none` syntax type.

If this doesn't trigger a CI build preview, I can test locally to verify.

* [css] Don't display ul/li bullets on UI 'tabs-nav' components.

* [docs] Revert HA docs changes.

This reverts commit f5cf5c7e4f.

src/sass/styles.sass

@@ -1,4 +1,3 @@
-
 @import "reset"
 @import "skin"
 
@@ -6,5 +5,3 @@
 @import "base"
 @import "tablet"
 @import "desktop"
-
-

static/css/styles.css

@@ -440,8 +440,9 @@ dd { margin-bottom: 16px; }
 
 #docsContent li { margin-bottom: 0.75em; font-size: 16px; line-height: 1.75em; }
 
-/* No bullets for checklists */
-#docsContent ul.task-list>li { list-style-type: none !important; }
+/* No bullets for checklists or 'UI Nav' components. */
+#docsContent ul.task-list>li,
+#docsContent ul.ui-tabs-nav>li.ui-tabs-tab { list-style-type: none !important; }
 
 #docsContent table { width: 100%; border: 1px solid #ccc; border-spacing: 0; margin-top: 30px; margin-bottom: 30px; }