Clean visual style, part II: extend bright style, convert icons, more touch-ups.

This commit removes the remaining white icons from the previous style,
which was a mix of 'holo dark' (i.e. light) icons and other un-fitting
icons. It's all replaced with theme-colored icons.

The primary color itself had been altered a bit towards green (#18aba1).
Other than the icon replacements, this commit changes:
 - tab switcher: fix cosmetic bug in the title bar in <= xhdpi devices
 - tab switcher: better incognito presentation
 - settings: enable back (<-) arrow
 - settings: bold color in the activity (on L and up)
 - settings: rationalized launching
 - better spacings on the mobile title bar
 - better padding on history items
 - add proportional padding (1em) to the incognito page
 - the incognito tab bar gets a bit darker
 - ['Ingnito Page', 'New Incognito Tab'] -> 'Private Browsing'
 - 'Page info' -> 'Page information' (no abbrevs when user facing :)

Vast amount of unused resources are removed from the APK.

Change-Id: I4add15fc686495ce27f63e26c2c56c14fa3d6603
diff --git a/res/layout/new_folder_layout.xml b/res/layout/new_folder_layout.xml
index dc0fa39..bd34087 100644
--- a/res/layout/new_folder_layout.xml
+++ b/res/layout/new_folder_layout.xml
@@ -26,7 +26,7 @@
         android:layout_height="wrap_content"
         android:gravity="center_vertical"
         android:minHeight="?android:attr/listPreferredItemHeight"
-        android:src="@drawable/ic_folder_holo_dark" />
+        android:src="@drawable/ic_deco_folder_normal" />
   <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
@@ -50,7 +50,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:gravity="center_vertical"
-        android:src="@drawable/ic_tab_close"
+        android:src="@drawable/ic_action_close"
         android:contentDescription="@string/cancel"
         />
   </LinearLayout>