fix(action-sheet): action sheet button shortens when activated in Safari

closes #5828

Author: manucorporat

ionic/components/action-sheet/action-sheet.ios.scss

@@ -67,7 +67,7 @@ ion-action-sheet {
 
 .action-sheet-button {
   padding: $action-sheet-ios-button-padding;
-
+  margin: 0;
   min-height: $action-sheet-ios-button-min-height;
 
   border-bottom: $action-sheet-ios-button-border-width $action-sheet-ios-button-border-style $action-sheet-ios-border-color;