Clean templates where the waiter icon is called

The waiter icon is displayed by region where an ajax refresh is called, displaying a small wheel to give user the feedback something is happening.

After jsf2 migration and component updates, each wheel in the page was visible, even if a region was not impacted by a refresh.

-> clean templates: maybe we only need one region that call the wheel.
-> to remove the fixed position, comment the following rules in nuxeo-platform-webapp-core/.../richfaces_components.css

.rf-st-start {
  background-color: "info (__FLAVOR__ background)";
  border: 1px solid #fff;
  height: 20px;
  padding: .7em .5em .5em;
  position: fixed;
  right: 40px;
  text-align: center;
  top: 55px;
  width: 20px;
  z-index: 10000 }