Add checkbox for existing option to disable camera reset on movement

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

@@ -119,6 +119,16 @@
    name="arrow_keys_move_avatar_check"
    width="237"
    top_pad="5"/>
+  <check_box
+   control_name="AlchemyMotionResetsCamera"
+   follows="left|top"
+   height="20"
+   label="Moving resets the camera position"
+   layout="topleft"
+   left_delta="0"
+   name="motion_reset_camera_check"
+   width="237"
+   top_pad="0"/>
   <check_box
    control_name="AllowTapTapHoldRun"
    follows="left|top"