Fix CreateButton does not update on 'to' prop change

[rkfg]

I need the CreateButton to reflect the filter values to prefill the new item form. The use case is like this:

• filter the data by a couple of fields
• no expected data found
• press Create
• expect those two fields filled with the filter values

It worked almost fine except I needed to refresh the page after setting the filter to make the to property be in sync with the filter (. After some research I found out that this button is exported via memo and it's not updated if the to prop is changed. I replaced the TopToolbar in List and the button is declared like this:

    <CreateButton to={{
      pathname: '/records/create',
      search: `?source=${JSON.stringify({ organization_id: filterValues.organization_id, department_id: filterValues.department_id })}`,
    }} />

When I used a regular button it worked just fine. Not all buttons in ra-ui-materialui are wrapped into memo (the other two I found are ShowButton and CloneButton), I'm not sure if this is an important optimization or if it has some deeper meaning but apparently it might cause this subtle bugs.

[fzaninotto]

Thanks!