[docs] Use StrictMode compatible transitions

Author: eps1lon

docs/src/modules/components/AppDrawerNavItem.js

@@ -4,7 +4,7 @@ import clsx from 'clsx';
 import { makeStyles } from '@material-ui/core/styles';
 import ListItem from '@material-ui/core/ListItem';
 import Button from '@material-ui/core/Button';
-import Collapse from '@material-ui/core/Collapse';
+import { unstable_StrictModeCollapse as Collapse } from '@material-ui/core/Collapse';
 import Link from 'docs/src/modules/components/Link';
 
 const useStyles = makeStyles((theme) => ({

docs/src/modules/components/Demo.js

@@ -7,7 +7,7 @@ import { useSelector, useDispatch } from 'react-redux';
 import { withStyles, fade } from '@material-ui/core/styles';
 import IconButton from '@material-ui/core/IconButton';
 import useMediaQuery from '@material-ui/core/useMediaQuery';
-import Collapse from '@material-ui/core/Collapse';
+import { unstable_StrictModeCollapse as Collapse } from '@material-ui/core/Collapse';
 import NoSsr from '@material-ui/core/NoSsr';
 import EditIcon from '@material-ui/icons/Edit';
 import CodeIcon from '@material-ui/icons/Code';

docs/src/modules/components/DemoLanguages.js

@@ -1,7 +1,7 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import { withStyles } from '@material-ui/core/styles';
-import Fade from '@material-ui/core/Fade';
+import { unstable_StrictModeFade as Fade } from '@material-ui/core/Fade';
 import ToggleButton from '@material-ui/lab/ToggleButton';
 import ToggleButtonGroup from '@material-ui/lab/ToggleButtonGroup';
 import { JavaScript as JavaScriptIcon, TypeScript as TypeScriptIcon } from '@material-ui/docs';

docs/src/modules/components/Notifications.js

@@ -8,7 +8,7 @@ import Tooltip from '@material-ui/core/Tooltip';
 import IconButton from '@material-ui/core/IconButton';
 import Badge from '@material-ui/core/Badge';
 import Popper from '@material-ui/core/Popper';
-import Grow from '@material-ui/core/Grow';
+import { unstable_StrictModeGrow as Grow } from '@material-ui/core/Grow';
 import Paper from '@material-ui/core/Paper';
 import ClickAwayListener from '@material-ui/core/ClickAwayListener';
 import List from '@material-ui/core/List';