Nomad-UI: &reg is replaced by ® in logs

### Nomad version
1.3.5

### Operating system and Environment details
Linux, Fedora release 29

### Issue
When viewed in nomad-ui, the string `®` is being replaced by ® character in allocation logs.

### Reproduction steps
Run the job file included below. In nomad-ui navigate to allocation logs and inspect them. You'll see this:


#### Expected Result
The log content should be rendered literally. `®` should display as `®`.

#### Actual Result
`®` is being replaced by ® character.

### Job file (if appropriate)

```
job "test" {
group "test" {
task "test" {
driver = "docker"
config {
image = "alpine"
command = "echo"
args = [
"blabla®ion=us",
]
}
}
}
}
```

### Notes

Issue reproduced on both chrome and firefox.

`nomad alloc logs` works fine.

Start in the Nomad-UI allocation logs view and reproduce the issue with the provided job file in Chrome or Firefox. Trace how the log content is rendered, then verify that the literal string ® remains ® in the browser while nomad alloc logs continues to work as expected.

Written by the indexing model from the issue text.