Up! Sorry but I found the message above irrelevant to the problem I noticed.

I still think it is useful to reduce the number of steps, and consequently add a New Folder button as early as possible. 

I use mail filters mostly to send list and sender messages to specific folders.

In that sense it would quicken my config work to be proposed a "new folder" checkbox when I click on Move as as the action. Thereafter I would directly meet the box to chose the folder's location and name.

Just a few steps less.... 

[quote user="arnaudherve"]

I use mail filters mostly to send list and sender messages to specific folders.

In that sense it would quicken my config work to be proposed a "new folder" checkbox when I click on Move as as the action. Thereafter I would directly meet the box to chose the folder's location and name.

Just a few steps less.... 

[/quote]

There is no gain here, AFAIK. You need to activate something either it being the "set" button or a checkbox and "go" button (or the like).