fix css so that when the library doesn't fill the screen, the modal does not shrink

src/components/modal/modal.css

@@ -19,6 +19,8 @@
     -webkit-overflow-scrolling: 'touch';
     user-select: none;
     height: 100%;
+    width: 100%;
+    display: flex;
 }
 
 /*

src/components/modal/modal.jsx

@@ -21,6 +21,7 @@ class ModalComponent extends React.Component {
             >
                 <Box
                     direction="column"
+                    grow="1"
                 >
                     <div className={styles.header}>
                         <div className={classNames(styles.headerItem, styles.headerItemFilter)}>