default_settings and default_options contain unused values

default_settings has **height** which is not used.

```
default_settings = DefaultDict(type='line', name=False, 
                              height=400, save=False, stock=False, show='tab', display=True)
```

default_options has **type** which is not used.

```
default_options = DefaultDict(width='auto', height=400, scale=2, type='line')
```
