Try to add the following code snippet to the Custom CSS area in Theme Settings to add dashboard icon.

.woodmart-my-account-links .dokan-link > a:before {
	content: "";
  background-image: url(http://freeart.store/wp-content/uploads/2018/01/groceries-store.svg);
	background-repeat: no-repeat;
	background-position: center;
	background-size: 50px;
	width:50px;
	height:50px;
	margin: 0px auto 10px auto;
  transition: all .25s ease;
	-webkit-transition: all .25s ease;
}

.woodmart-my-account-links .dokan-link > a:hover:before {
  background-image: url(http://freeart.store/wp-content/uploads/2018/01/groceries-store-hover.svg);
}

Also, there are two SVG icons were uploaded to your media gallery, do not delete them.

Regards