Bottom bar when updating filters is very bright in dark theme

### Please answer the following questions for yourself before submitting an issue.

- [X] I am running the latest version
- [X] I checked the documentation and found no answer
- [X] I checked to make sure that this issue has not already been filed

### AdGuard version

4.4.5

### Tunnel mode

None

### Environment

```markdown
- OS: 16.3
- Device and storage size: iPhone XR, 64 GB
```

### What filters do you have enabled?

_No response_

### Issue Details

Bottom popup when updating filters is very bright in dark theme.

### Expected Behavior

The bottom popup when updating filters is dark gray in dark theme. After all, in a light theme you have a light gray popup, not black.

### Screenshots

Screenshots



### Additional Information

_No response_