Fix the send button tooltip

[brichet]

This PR fixes the tooltip on the send button.

This PR restore the helper text containing the shortcut to send a message.

Part of #303

[github-actions]

👈 Launch a Binder on branch brichet/jupyter-chat/restore_helper_text

[jtpio]

Thanks for looking into adding this back.

Wondering what this would look like when the toolbar has many buttons, like in jupyterlite/ai#218?

Otherwise, maybe we don't really need to add it back?

[brichet]

Otherwise, maybe we don't really need to add it back?

I often find it useful, each chat system has it's own way to add a new line, and I'm often confused. In the context of AI, it's annoying to send an incomplete message when you only wanted to add a new line.
But maybe we can show this information in a different way, like a tooltip on the send button for example.

[jtpio]

each chat system has it's own way to add a new line

Nowadays they often seem to default to (at least for the most popular AI chats / IDEs):

• Enter: send the message
• Shift Enter: new line

Also after checking a couple of them, most don't seem to be showing such helper text.

But maybe we can show this information in a different way, like a tooltip on the send button for example.

Otherwise this could be a setting, to let administrators choose if they want to show it to their users?

[brichet]

Otherwise this could be a setting, to let administrators choose if they want to show it to their users?

It may be a bit overkill to add a settings for it. If we go in that direction, let remove the option to set it up, and keep one way only to send message and one to add a new line (this is not my favorite option, though).

But maybe we can show this information in a different way, like a tooltip on the send button for example.

To make sure we're talking about the same thing, I was thinking of something like what we have in notebook buttons:

We could have a tooltip like Send message (Enter) or Send message (Shift+Enter), and that could help deducting how to add a new line.

[nakul-py]

To make sure we're talking about the same thing, I was thinking of something like what we have in notebook buttons:
We could have a tooltip like Send message (Enter) or Send message (Shift+Enter), and that could help deducting how to add a new line.

I agree with this.

[jtpio]

We could have a tooltip like Send message (Enter) or Send message (Shift+Enter), and that could help deducting how to add a new line.

Sounds like a good tradeoff 👍

[brichet]

Actually the tooltip was already there, but not initialized.

I updated the PR to revert the previous changes and fix tooltip initialization.

[brichet]

Merging it, it is only a small bug fix.