Widget based plots don't look good on a smartphone

#### ALL software version info

Software Version Info

```plaintext
hvplot = 0.11.3.dev11+gbb3be85.d20250203
holoviews = 1.20.1a0
bokeh = 3.6.2
```

#### Description of expected and observed behavior

**Expected Behavior**
When I set `responsive=True` on a widget-based plot, I expect both the plot and its widgets to dynamically scale for smaller screens (e.g., smartphone displays).

**Observed Behavior**
While the plot resizes correctly, the widgets remain at their original size, causing them to overlap and obscure the plot.

#### Complete, minimal, self-contained example code that reproduces the issue

```python
import pandas as pd
import hvplot.pandas

data = 'https://datasets.holoviz.org/penguins/v1/penguins.csv'
df_penguins = pd.read_csv(data)

df_penguins.hvplot.scatter(x='bill_length_mm', y='bill_depth_mm',
groupby=['island', 'sex'], height=300, responsive=True)
```

#### Stack traceback and/or browser JavaScript console output
None

#### Screenshots or screencasts of the bug in action
**iPhone 14 Pro-max**


**Samsung galaxy S20 Ultra**


**Google Pixel 7**


- [ ] I may be interested in making a pull request to address this