Docs: Fixes to Preview "Program Overview" page; rewording on "Support" page

Fixes broken anchors in yellow banner on English version. Adds the banner
to non-English version pages. Adjusted wording for a Known Issue on the
"Support and Release Notes" page.

Change-Id: Ia1db8db34cec854bcc4ad7daa1ad44fa23fc878e
diff --git a/docs/html/preview/overview.jd b/docs/html/preview/overview.jd
index a19c926..009e268 100644
--- a/docs/html/preview/overview.jd
+++ b/docs/html/preview/overview.jd
@@ -13,13 +13,13 @@
 
  <ul class="dac-section-links">
     <li class="dac-section-link">
-      <a href="#preview2-notes">
+      <a href="{@docRoot}preview/support.html#preview2-notes">
       <span class="dac-sprite dac-auto-chevron"></span>
       Read the Notes</a>
     </li>
 
     <li class="dac-section-link">
-      <a href="#preview2-get">
+      <a href="{@docRoot}preview/support.html#preview2-get">
       <span class="dac-sprite dac-auto-chevron"></span>
       Get the Update</a>
     </li>