Changing the proposal order should restart at the first page
Here is a small issue relative to data.esrf.fr.
I saw that if i reorder the proposal list, the page do not change the selected page, so we don't really know the context and where we are (what's before or after).
So i feel like it would be better to reset the page to the first one in this case.
I did not check the way behave other software. There is maybe different approaches.