on custom filters, chip always displays

When there are custom filters the chip always displays. When the X on the chip is clicked the filter does reset, but the chip remains.

Thank you for the awesome component! ❤️

## Expected Behavior
I expect the chip to disappear when its X is clicked with custom filters.

## Current Behavior
The chip does not disappear when its X is clicked with custom filters.

## Steps to Reproduce (for bugs)
Use column options such as below:
```
const options = {
filter: true,
filterList: filterText,
filterType: 'custom',
customFilterListRender: v => 'Filter On',
filterOptions: {
names: filterText,
logic: filterOut,
display: Display,
},
sort: false,
}
```
## Your Environment
| Tech | Version |
|--------------|---------|
| Material-UI | @material-ui/core@3.9.2 |
| MUI-datatables | mui-datatables@2.7.0 |
| React | react@16.8.3 |
| browser | chrome 75.0.3770.142 |
| platform | mac |