Style : List of samples

Need to review the entire style of this page.
In particular :

-When user add/edit a sample :
 . It is not necessary to display the attribute pick-up list, if there is no attribute defined for the sample.
 .The icon used to add a file is the icon to download a file. Not ergonomic and incoherent with the rest of the application
 .The button at the bottom of the page are not on the same line. "Update Sample" should be "Save"

-When user comment a sample :
 .The Comment of readers section title should be "Comments"

-All popups :
 .Add a sample file pop up : button are touching each other. Button "update" should be "save"
 .Delete an instance file popup : button touch each other
 .Delete an instance file popup : rename to "Delete file" both in the title and on the button