Suggest Widget Details: Maintain Constant Size

[Number-3434]

Please add an option to maintain a constant size for details in the suggest widget. The details are currently jumping to fit the size, which makes it very hard to read.

Here is an example of the issue:

https://github.com/microsoft/vscode/assets/115815794/1bd13146-6855-4158-a8be-1b4d001d96e6

Ideally, there should be a setting to make the details maintain consistent size.

In this case, the details will expand to fit the space, instead of constantly jumping.