If we take content with $().text(), to insert it in another node we have to
used $().text(value) also. If like before this commit, we would use $().html()
the content would be unescaped one time too much.
Double clicking on the confirm button was actually possible and could confirm the orders multiple times (which could be problematic if some action are linked to the so confirmation)
Before this fix, it was possible to validate then cancel a quote (or the other way around) simply by using two tabs in your browser. From now on, we only validate/cancel a quote if it's the 'sent' state and advise the customer of the situation if he tries to abuse the process.