Home button needs left margin

[mattrunyon]

Description

When using multiple dashboards through dh.ui, the home button to return to code studio needs some left margin

Steps to reproduce

from deephaven import ui
from deephaven.plot import express as dx
from deephaven.plot.figure import Figure

_stocks = dx.data.stocks()
_cat_stocks = _stocks.where("sym=`CAT`")
_dog_stocks = _stocks.where("sym=`DOG`")
_stocks_plot = (
    Figure()
    .plot_xy("Cat", _cat_stocks, x="timestamp", y="price")
    .plot_xy("Dog", _dog_stocks, x="timestamp", y="price")
    .show()
)

my_dash = ui.dashboard(
    ui.column(
        ui.row(
            ui.stack(ui.panel(_cat_stocks, title="Cat")),
            ui.stack(ui.panel(_dog_stocks, title="Dog")),
        ),
        ui.stack(ui.panel(_stocks_plot, title="Stocks")),
    )
)