For GLPI 0.90 MOVES TO https://github.com/tomolimo/mask
This plugin shows a mask when you click on a submit button. This prevents you from double clicks on submit buttons.
The mask is half transparent so that you can still see what's behind.
A message is shown during the sending of the data to the server in order to make you fill better when waiting :)!
Waiting message is localized.
Sample of the Mask behavior after a click on the 'update' button: