Don't hardcode bg color in panel_outfit_gallery_item

indra/newview/skins/default/colors.xml

@@ -675,6 +675,9 @@
      name="PanelNotificationBackground"
      value="1 0.3 0.3 0" />
     <color
+     name="PanelOutfitBg"
+     reference="FrogGreen" />
+	<color
      name="ParcelHoverColor"
      reference="White" />
     <color

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

@@ -2,8 +2,8 @@
 <panel
    background_visible="false"
    background_opaque="false"
-   bg_alpha_color="FrogGreen"
-   bg_opaque_color="FrogGreen"   
+   bg_alpha_color="PanelOutfitBg"
+   bg_opaque_color="PanelOutfitBg"   
    border="false"
    bevel_style="none"
    follows="left|top"

indra/newview/skins/heretic/colors.xml

@@ -78,7 +78,7 @@
       value="0.169 0.169 0.169 1" />
   <color
       name="MouseGray"
-      value="0.191 0.191 0.191 1" />
+      reference="SL-Background" />
   <color
       name="Black"
       value="0 0 0 1" />
@@ -816,6 +816,9 @@
   <color
       name="PanelNotificationBackground"
       value="1 0.3 0.3 0" />
+  <color
+     name="PanelOutfitBg"
+     reference="Taffy_35" />
   <color
       name="ParcelNormalColor"
       reference="White" />