EXP-1355 PROGRESS -- Chat toast can be covered by chat floater in default position

* Moved chat, move and view floaters to new default positions.

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

 <?xml version="1.0" encoding="utf-8" standalone="yes" ?>
 <floater
  open_positioning="specified"
- specified_left="683"
- specified_bottom="0"
+ specified_left="320"
+ specified_bottom="80"
  legacy_header_height="18"
  can_minimize="true"
  can_close="true"

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

 <?xml version="1.0" encoding="utf-8" standalone="yes" ?>
 <floater
  open_positioning="specified"
- specified_left="150"
- specified_bottom="0"
+ specified_left="320"
+ specified_bottom="10"
  height="60"
  layout="topleft"
  legacy_header_height="25"

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

 <?xml version="1.0" encoding="utf-8" standalone="yes" ?>
 <floater
  open_positioning="specified"
- specified_left="535"
- specified_bottom="0"
+ specified_left="558"
+ specified_bottom="80"
  legacy_header_height="18"
  can_dock="false"
  can_minimize="true"