✨ Added a background image input

Added an input in the advanced options for a background image. Also removed an unused import from my previous commit and changed the margin on the header bar to padding instead.

src/components/Settings/CommonSettings.tsx

@@ -5,7 +5,6 @@ import {
   SegmentedControl,
   TextInput,
   Anchor,
-  ColorPicker,
   useMantineTheme,
 } from '@mantine/core';
 import { useState } from 'react';