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/bookmarks_drag_actionmode.xml b/res/layout/bookmarks_drag_actionmode.xml
index 64b1042..df64fb9 100644
--- a/res/layout/bookmarks_drag_actionmode.xml
+++ b/res/layout/bookmarks_drag_actionmode.xml
@@ -30,19 +30,19 @@
         android:layout_height="match_parent"
         android:paddingLeft="16dip"
         android:paddingRight="16dip"
-        android:src="@drawable/ic_web_holo_dark" />
+        android:src="@drawable/ic_deco_favicon_normal" />
     <ImageView
         android:id="@+id/new_window_context_menu_id"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:paddingLeft="16dip"
         android:paddingRight="16dip"
-        android:src="@drawable/ic_new_window_holo_dark" />
+        android:src="@drawable/ic_action_add_tab" />
     <ImageView
         android:id="@+id/info"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:paddingLeft="16dip"
         android:paddingRight="16dip"
-        android:src="@drawable/ic_home_info_holo_dark" />
+        android:src="@drawable/ic_deco_info_normal" />
 </LinearLayout>