Remove redundant thinking updates

Question

```
    thinking for 201s

thinking for 201s

thinking for 202s

thinking for 202s
```

I don't know if this is intended or not, but I occasionally will get a group of these thinking responses within a second or two of each other, typically in groups of five before a command is displayed.

```
    thinking for 59s

thinking for 59s

thinking for 60s

command
```

This takes up vertical space in terminal wi