message: fix(Button): fix icon alignment
diff: @@ -37,7 +37,7 @@ $ladda-background-transition: background $color-transition-duration $g-easing;
  padding-right: spacing(small, 3x);
  }
  - ::ng-deep md-icon {
  + ::ng-deep .mat-icon {
  // center the icon
  left: .1em;
  position: relative;
  @@ -102,7 +102,7 @@ $ladda-background-transition: background $color-transition-duration $g-easing;
  }
  &[data-loading] {
  - ::ng-deep .ladda-label {
  + .ladda-label {
  opacity: $no-interaction-opacity;
  }
  }
  @@ -117,10 +117,11 @@ $ladda-background-transition: background $color-transition-duration $g-easing;
  }
  // Adjust icon vertical layout
  - md-icon {
  + ::ng-deep .mat-icon {
  // Fix small vertical aligment issue between icon & text
  margin-top: -.1em;
  transition: transform $icon-transition-duration-expand $g-easing;
  + vertical-align: middle;
  will-change: transform;
  }
  