bmansour1

Fix issue #9198: Add 🚫 icon for disconnected websocket

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## Describe your changes Added a check for if the websocket is disconnected and if so, all the nav bar icons will be set to 🚫 to show the proper...

Support for powershell commands

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**Link to doc page in question (if any):** https://github.com/streamlit/streamlit/wiki/Contributing **Name of the Streamlit feature whose docs need improvement:** installing for web development **What you think the docs should say:** I...