extjs/modern/theme-mountainview/sass/src/Sheet.scss

   1 .x-sheet-action {
   2         padding: 15px;
   3
   4         .x-button {
   5                 margin-bottom: 15px;
   6
   7                 &:last-child {
   8                         margin-bottom: 0;
   9                 }
  10         }
  11 }