Add tool tips to the new privacy features

Author: FelixWolf

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

@@ -78,6 +78,7 @@
      control_name="EnableLookAtTarget"
      height="16"
      label="Enable LookAt"
+     tool_tip="Enable tracking cursor position with avatar head's rotation"
      layout="topleft"
      left="30"
      name="enable_lookat_target"
@@ -88,6 +89,7 @@
      control_name="LimitLookAtTarget"
      height="16"
      label="Limit LookAt Distance"
+     tool_tip="Limit the look at target's distance by restricting it around the avatar's head"
      layout="topleft"
      left="50"
      name="limit_lookat_distance"
@@ -97,6 +99,7 @@
      control_name="EnableSelectionHints"
      height="16"
      label="Enable Selection Hints"
+     tool_tip="Enable reporting and tracking current selection using 'beam' particles and character animations"
      layout="topleft"
      left="30"
      name="enable_selection_hints"