fixes #4444: clarify docs copy that new icon white style is intentional on...

fixes #4444: clarify docs copy that new icon white style is intentional on active and hover links in .nav and .dropdown-menu

docs/base-css.html

@@ -1756,7 +1756,7 @@ For example, <code><section></code> should be wrapped as inlin
 <pre class="prettyprint linenums">
 &lt;i class="icon-search"&gt;&lt;/i&gt;
 </pre>
-          <p>There are also styles available for inverted (white) icons, made ready with one extra class:</p>
+          <p>There are also styles available for inverted (white) icons, made ready with one extra class. We will specifically enforce this class on hover and active states for nav and dropdown links.</p>
 <pre class="prettyprint linenums">
 &lt;i class="icon-search icon-white"&gt;&lt;/i&gt;
 </pre>

docs/templates/pages/base-css.mustache

@@ -1693,7 +1693,7 @@
 <pre class="prettyprint linenums">
 &lt;i class="icon-search"&gt;&lt;/i&gt;
 </pre>
-          <p>{{_i}}There are also styles available for inverted (white) icons, made ready with one extra class:{{/i}}</p>
+          <p>{{_i}}There are also styles available for inverted (white) icons, made ready with one extra class. We will specifically enforce this class on hover and active states for nav and dropdown links.{{/i}}</p>
 <pre class="prettyprint linenums">
 &lt;i class="icon-search icon-white"&gt;&lt;/i&gt;
 </pre>