Clicking the macOS Dock icon will always bring the Bookshelf window to the front

[ElysiumCreed]

On macOS, when you open a book with Thorium, two windows appear: the Bookshelf window and the book window. At this point, the book window is on top. If you click the Thorium icon in the macOS Dock, it will always bring the Bookshelf window to the front, even though the book window is above the Bookshelf window. However, if you use the Command + Tab shortcut to switch to Thorium, the book window will remain on top.

Could you kindly modify the logic for clicking the macOS Dock icon to maintain the original window layout? Thank you!