A thought while trying out the PR: I wonder if there's an easy way to add a way to close all reading tabs, similar to clicking on the icons on the left to collapse the left sidebar? I guess we're starting to get too many kinds of UI elements with a left sidebar, a second reading pane, and a right sidebar, and it would be good to unify or standardize them. No action to take now, just thinking out loud.

Originally posted by @hammer in #137 (comment)

This can be implemented by adding an action similar to VS Code in the OPEN FILES header.