[Docs] In the standard library docs, Most outline items on the RHS are truncated

[cphlipot1]

In the outline on the RHS of https://perfetto.dev/docs/analysis/stdlib-docs most of the items are truncated with trailing "...", even when there is ample horizontal space in the browser window, impacting readability.

Here is an example of what the page looks like fully maximized on a 4K monitor:

[LalitMaganti]

@aMayzner