fix contact selection header theming

Fixes #1343
// FREEBIE

res/layout/push_contact_selection_list_header.xml

@@ -14,12 +14,12 @@
               android:layout_centerVertical="true"
               android:layout_alignParentLeft="true"
               android:textSize="15sp"
-              android:textColor="?conversation_sent_text_secondary_color"
+              android:textColor="?conversation_selection_header_text"
               android:textStyle="bold" />
 
     <View android:layout_width="match_parent"
           android:layout_height="3dp"
           android:layout_alignParentBottom="true"
           android:layout_marginTop="2dp"
-          android:background="?conversation_received_text_secondary_color" />
+          android:background="?conversation_selection_header_text" />
 </RelativeLayout>

res/values/attrs.xml

@@ -49,6 +49,7 @@
     <attr name="contact_selection_push_user" format="reference|color" />
     <attr name="contact_selection_lay_user" format="reference|color" />
     <attr name="contact_selection_label_text" format="reference|color" />
+    <attr name="conversation_selection_header_text" format="reference|color" />
 
     <attr name="navigation_drawer_background" format="reference|color"/>
     <attr name="navigation_drawer_text_color" format="color"/>

res/values/themes.xml

@@ -28,6 +28,7 @@
         <item name="contact_selection_push_user">#ff000000</item>
         <item name="contact_selection_lay_user">#a0000000</item>
         <item name="contact_selection_label_text">#66000000</item>
+        <item name="conversation_selection_header_text">#44000000</item>
 
         <item name="conversation_background">#ffdddddd</item>
         <item name="conversation_editor_background">@drawable/textlines</item>
@@ -100,6 +101,7 @@
         <item name="contact_selection_push_user">#ffeeeeee</item>
         <item name="contact_selection_lay_user">#afeeeeee</item>
         <item name="contact_selection_label_text">#66eeeeee</item>
+        <item name="conversation_selection_header_text">#66eeeeee</item>
 
         <item name="conversation_item_received_background">@drawable/conversation_item_received_shape_dark</item>
         <item name="conversation_item_received_triangle_background">@drawable/conversation_item_received_triangle_shape_dark</item>