Filters applied with JavaScript property paths do not retain state

[scottlowe]

What you were expecting:

1. Apply 2 filters with source username and company.street to a Users list view
2. Navigate away to a list view of Posts
3. Navigate back to Users list view
4. Expect both filters username and company.street to still be applied to Users list

What happened instead:
When returning to the Users list view, only filter username is still applied. The filter company.street has disappeared.

Note: The filter that has disappeared has a compound property path as its source.

Steps to reproduce:
Steps to reproduce are identical to the "expected" steps above. However, here is an additional screen capture to better illustrate the bug:

Related code:

• A sample application via GitHub
  https://github.com/scottlowe/filter-bug-admin

const UserFilter = (props) => (
    <Filter {...props}>
        <TextInput source="username" />
        {*/ Here's the problem */}
        <TextInput source="company.name" />  
    </Filter>
);

export const UserList = props => (
    <List {...props} filters={<UserFilter />}>
        <Datagrid rowClick="edit">
            <TextField source="id" />
            <TextField source="username" />
            <TextField source="company.name" />
        </Datagrid>
    </List>
);

Other information:

Environment

• React-admin version: 2.9.2
• React version: 16.8.6
• Browser:
  • Firefox 67.0
  • Chrome 75.0.3770.90
  • Chromium 72.0.3626.81
  • Safari 12.1.1

This issue possibly relates to #2657

[scottlowe]

Ach. I have just found that a fix has already been committed for this bug here: #3274