fix(ui): update artist link rendering and improve button styles

Signed-off-by: Deluan <deluan@navidrome.org>

ui/src/user/DeleteUserButton.jsx

@@ -1,7 +1,6 @@
 import React from 'react'
 import DeleteIcon from '@material-ui/icons/Delete'
-import { makeStyles } from '@material-ui/core/styles'
-import { fade } from '@material-ui/core/styles/colorManipulator'
+import { makeStyles, alpha } from '@material-ui/core/styles'
 import clsx from 'clsx'
 import {
   useDeleteWithConfirmController,
@@ -16,7 +15,7 @@ const useStyles = makeStyles(
     deleteButton: {
       color: theme.palette.error.main,
       '&:hover': {
-        backgroundColor: fade(theme.palette.error.main, 0.12),
+        backgroundColor: alpha(theme.palette.error.main, 0.12),
         // Reset on mouse devices
         '@media (hover: none)': {
           backgroundColor: 'transparent',