EXT-7309: PARTIAL FIXED: Investigate turning RenderAvatarMaxVisible down to 1...

EXT-7309: PARTIAL FIXED: Investigate turning RenderAvatarMaxVisible down to 1 or 2 on low end hardware.
added a slider in "preferences -> graphics -> Advanced" to change RenderAvatarMaxVisible value.

indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml

@@ -160,7 +160,7 @@
      layout="topleft"
      left="5"
      name="CustomGraphics Panel"
-     top="124"
+     top="76"
      width="485">
 		<text
 		type="string"
@@ -368,6 +368,34 @@
 		top_pad="7"
 		width="303" />
     <slider
+    control_name="RenderAvatarMaxVisible"
+    decimal_digits="0"
+    follows="left|top"
+    height="16"
+    increment="2"
+    initial_value="35"
+    label="Max. avatar draw distance:"
+    label_width="185"
+    layout="topleft"
+    left_delta="0"
+    max_val="65"
+    min_val="1"
+    name="MaxAvatarDrawDistance"
+    top_pad="7"
+    width="290" />
+    <text
+    type="string"
+    length="1"
+    follows="left|top"
+    height="12"
+    layout="topleft"
+    left_delta="291"
+    name="DrawDistanceMeterText2"
+    top_delta="0"
+    width="128">
+      m
+    </text>
+		<slider
 		control_name="RenderGlowResolutionPow"
 		decimal_digits="0"
 		follows="left|top"
@@ -377,7 +405,7 @@
 		label="Post process quality:"
 		label_width="185"
 		layout="topleft"
-		left_delta="0"
+		left="200"
 		max_val="9"
 		min_val="8"
 		name="RenderPostProcess"
@@ -522,7 +550,7 @@
         layout="topleft"
         left="469"
         name="PostProcessText"
-        top="305"
+        top="325"
         width="128">
            Low
         </text>
@@ -607,7 +635,7 @@
         layout="topleft"
         left="200"
         name="LightingDetailText"
-        top_pad="8"
+        top_pad="18"
         width="140">
            Lighting detail:
         </text>
@@ -644,7 +672,7 @@
         layout="topleft"
         left_pad="-30"
         name="TerrainDetailText"
-        top="465"
+        top="497"
         width="155">
            Terrain detail:
         </text>