Fix persistent ajax status "in progress" on some user actions

There are some use cases where the "ajax request in progress" status is persistent, whereas the ajax request is done.

For instance: on a toggleable layout, use a list widget or a multi chain select widget, clicking on the "remove" icon in both cases, the status is not cleared. It is cleared again when clicking on "add" for instance.

This has been linked to a RichFaces bug, RF-12092, that's part of version 4.5.13-Final, but this version is still missing patch for VEND-9.

The issue can be worked around by specifying explicitely the name of the status to render on remove => use this solution for now, until NXP