Fix MaterialUI errors & warnings

Signed-off-by: Philipp Hugenroth <philipph@spotify.com>

packages/core-components/src/layout/Content/Content.tsx

@@ -24,7 +24,12 @@ const useStyles = makeStyles((theme: Theme) => ({
     minWidth: 0,
     paddingTop: theme.spacing(3),
     paddingBottom: theme.spacing(3),
-    ...theme.mixins.gutters({}),
+    paddingLeft: theme.spacing(2),
+    paddingRight: theme.spacing(2),
+    [theme.breakpoints.up('sm')]: {
+      paddingLeft: theme.spacing(3),
+      paddingRight: theme.spacing(3),
+    },
   },
   stretch: {
     display: 'flex',

packages/core-components/src/layout/Sidebar/Items.tsx

@@ -167,7 +167,7 @@ export const SidebarItem = forwardRef<any, SidebarItemProps>((props, ref) => {
     <Badge
       color="secondary"
       variant="dot"
-      overlap="circle"
+      overlap="circular"
       invisible={!hasNotifications}
     >
       <Icon fontSize="small" />

plugins/shortcuts/src/AddShortcut.tsx

@@ -86,7 +86,7 @@ export const AddShortcut = ({ onClose, anchorEl, api }: Props) => {
     <Popover
       open={open}
       anchorEl={anchorEl}
-      onExit={handleClose}
+      TransitionProps={{ onExit: handleClose }}
       onClose={onClose}
       anchorOrigin={{
         vertical: 'top',