[@mantine/core] Fixed Pagination autoContrast given by MantineProvider

[dswbx]

The Pagination component's autoContrast worked when property is added to the component. But if the global autoContrast from theme object was given, it was ignored.

Worked:

<Pagination total={45} autoContrast />

Didn't work:

<MantineProvider theme={{ autoContrast: true }}>
  <Pagination total={45} />
</MantineProvider>

Also added a pagination story to show the case along with a button (which can be removed of course).

[rtivital]

Thanks for reporting the issue! The fix that you've provided is not valid, I've implemented it differently. The fix will be available with the next patch.