Flip mark as (un)read icons back

app/src/main/res/menu/chapter_selection.xml

@@ -28,13 +28,13 @@
 
     <item
         android:id="@+id/action_mark_as_read"
-        android:icon="@drawable/ic_done_all_grey_24dp"
+        android:icon="@drawable/ic_done_all_white_24dp"
         android:title="@string/action_mark_as_read"
         app:showAsAction="always" />
 
     <item
         android:id="@+id/action_mark_as_unread"
-        android:icon="@drawable/ic_done_all_white_24dp"
+        android:icon="@drawable/ic_done_all_grey_24dp"
         android:title="@string/action_mark_as_unread"
         app:showAsAction="always" />
 

app/src/main/res/menu/updates_chapter_selection.xml

@@ -16,13 +16,13 @@
 
     <item
         android:id="@+id/action_mark_as_read"
-        android:icon="@drawable/ic_done_all_grey_24dp"
+        android:icon="@drawable/ic_done_all_white_24dp"
         android:title="@string/action_mark_as_read"
         app:showAsAction="always" />
 
     <item
         android:id="@+id/action_mark_as_unread"
-        android:icon="@drawable/ic_done_all_white_24dp"
+        android:icon="@drawable/ic_done_all_grey_24dp"
         android:title="@string/action_mark_as_unread"
         app:showAsAction="always" />