[BUG] Incorrect handling of single-entry enter

When searching with the searchable picker, and there's only 1 result, but the result is a directory and you're only allowed to select files, then it shows "no files found" immediately, without showing possible other directories to traverse into.

For instance, in the `cmd` directory of another project (tree below) there are clearly 2 folders.
```
cmd
├── service
│   └── main.go
└── setup
└── main.go
```
When in `cmd`'s parent directory, and searching for `cmd`, then pressing `Enter`, I see this:

Which is inaccurate. Manually navigating into the directory does correctly show the folders, e.g.