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/menu/bookmark.xml b/res/menu/bookmark.xml
index b43d7ce..b7279aa 100644
--- a/res/menu/bookmark.xml
+++ b/res/menu/bookmark.xml
@@ -15,10 +15,10 @@
 -->
 
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:id="@+id/add_bookmark_menu_id"
-        android:title="@string/add_new_bookmark"
-        android:icon="@drawable/ic_add_string"/>
-    <item android:id="@+id/new_bmfolder_menu_id"
-        android:title="@string/new_folder"
-        android:icon="@drawable/ic_add_string"/>
+    <item
+        android:id="@+id/add_bookmark_menu_id"
+        android:title="@string/add_new_bookmark" />
+    <item
+        android:id="@+id/new_bmfolder_menu_id"
+        android:title="@string/new_folder" />
 </menu>
diff --git a/res/menu/browser.xml b/res/menu/browser.xml
index 32dc6ca..67915fe 100644
--- a/res/menu/browser.xml
+++ b/res/menu/browser.xml
@@ -50,12 +50,11 @@
                     android:id="@+id/incognito_menu_id"
                     android:title="@string/new_incognito_tab"
                     android:icon="@drawable/ic_action_add_incognito" />
-
 <!--
                 <item
                     android:id="@+id/close_other_tabs_id"
                     android:title="@string/close_other_tabs"
-                    android:icon="@drawable/ic_tab_close" />
+                    android:icon="@drawable/ic_action_close" />
 -->
             </menu>
         </item>