fixed EXT-3005 Ascii art looks ugly in the nearby chat

--HG--
branch : product-engine

indra/newview/skins/default/xui/en/panel_chat_separator.xml

@@ -3,6 +3,6 @@
  background_visible="true"
  bg_alpha_color="black"
  follows="left|right|top"
- height="1"
+ height="0"
  layout="topleft"
  name="chat_separator_panel" />

indra/newview/skins/default/xui/en/widgets/chat_history.xml

@@ -6,8 +6,8 @@
   right_text_pad="15"
   left_widget_pad="0"
   right_widget_pad="10"
-  top_separator_pad="2"
-  bottom_separator_pad="2"
+  top_separator_pad="1"
+  bottom_separator_pad="1"
   top_header_pad="12"
   bottom_header_pad="5"
 	max_length="2147483647"
@@ -22,4 +22,3 @@
     word_wrap="true"
     />
 </chat_history>
\ No newline at end of file
-enabledcontrol
\ No newline at end of file