feat: Modal.confirm supports zIndex prop #6722 (#6880)

* Modal.confirm supports zIndex prop #6722

* Fix filename

* Fix the zIndex missing in ModalFuncProps interface

components/modal/Modal.tsx

@@ -40,6 +40,7 @@ export interface ModalProps {
   transitionName?: string;
   className?: string;
   getContainer?: (instance: React.ReactInstance) => HTMLElement;
+  zIndex?: boolean;
 }
 
 export interface ModalContext {
@@ -60,6 +61,7 @@ export interface ModalFuncProps {
   okType?: ButtonType;
   cancelText?: string;
   iconType?: string;
+  zIndex?: boolean;
 }
 export type ModalFunc = (props: ModalFuncProps) => {
   destroy: () => void,

components/modal/confirm.tsx

@@ -91,6 +91,7 @@ export default function confirm(config) {
       maskClosable={maskClosable}
       style={style}
       width={width}
+      zIndex={props.zIndex}
     >
       <div className={`${prefixCls}-body-wrapper`}>
         {body} {footer}