Adds a list view option for viewing bookmarks

 Bug: 3166319
 This adds a popup menu option to the combined view that allows a
 user to switch between viewing their bookmarks as a grid of thumbnails
 or as a list of bookmarks with favicons.

Change-Id: I6729d477f574a46847dff4b69c1b32d9f63fb37f
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 4f63d3f..7d27dec 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -184,11 +184,11 @@
             showing. -->
     <string name="bookmark_page">Bookmark last-viewed page</string>
     <!-- Menu item in the page that displays all bookmarks.  Switches to
-            a grid view which shows thumbnails -->
-    <string name="switch_to_thumbnails">Thumbnail view</string>
+            a grid view which shows thumbnails [CHAR LIMIT=50] -->
+    <string name="bookmark_thumbnail_view">Thumbnail view</string>
     <!-- Menu item in the page that displays all bookmarks.  Switches to a
-            list view which shows titles -->
-    <string name="switch_to_list">List view</string>
+            list view which shows titles [CHAR LIMIT=50] -->
+    <string name="bookmark_list_view">List view</string>
     <!-- Summary text under the New Bookmark item on the Bookmarks screen.
             Tells the user that if they select this item, it will bring up a
             dialog to bookmark the page that the browser is currently viewing,