Fix: dispositions table's last column color (#2396)

When we moved the expand arrows to the left back in
c4d6628 we broke the CSS rules for
coloring the table, making the last disposition's column be grey instead
of its color, and leaving the percent column in black.

See #1266

Author: matiasgarciaisaia

assets/css/_card-table.scss

@@ -39,8 +39,8 @@
             }
           }
           &:first-child,
-          &:nth-last-child(2),
-          &:nth-last-child(3) {
+          &:nth-last-child(1),
+          &:nth-last-child(2) {
             @extend .grey-text;
           }
         }