Remove doubled padding from consecutive .obj-container elements

Of course this might be a stylistic choice and pretty much subjective
preference, but I think in most if not all places where this applies
it looks better with just 20px of padding instead of 40px.

This applies on the new tobira page and the access policy pages,
and possibly some other pages/tabs as well.

This shouldn't break anything, but if it is undesired or people
just rather stick with the status quo, I can of course remove
this again and apply the styles for the tobira page in-line.

src/styles/components/modals/_modal-base.scss

@@ -397,6 +397,10 @@
             &.padded {
                 padding: 20px;
             }
+
+            + .obj-container {
+                padding-top: 0;
+            }
         }
     }