Some actions in vega viewer do not work

[DonJayamanne]

The following actions do not work in vega viewer:

• View Source
• Open in Vega Editor

Thoughts:

• Do we know how many try using this feature?
• What if we were to just disable these two in the custom renderer?

[DonJayamanne]

They have been disabled,
Testing instructions:

• Install latest VS Code Insiders, Jupyter pre-release and Notebook renderers extension
• Install the following python packages
  pip install altair, vega, vega-datasets
• Run a cell in a notebook

import altair as alt
from vega_datasets import data

# Show an image where the interactive plot is not supported
alt.renderers.enable('mimetype')

source = data.cars()

alt.Chart(source).mark_boxplot().encode(
    x='Origin',
    y=alt.Y(alt.repeat('column'), type='quantitative'),
).repeat(column=['Horsepower', 'Weight_in_lbs'])

• Click on the hamburger menu and you should only get the options Save as PNG & SVG