@Morten ok so how can I hide/unhide Open files panel? Second thing, even if this is possible it is much easier to just point to the panel you want and make it "unhide" than remember all different shortcuts for all different panels.
You usually have for everything also a "button" or a menu. For the open files list you can use the mouse and press the "X" on the top-right of the window, as this is very common in Windows to close windows that way. Hence, most developers use shortcuts as this is way faster then mouse.
If you need anything else, provide patches. Look: I am reading say the tenth "suggestion" you after you might have used C::B for half a month or so. Why don't you first play a little more with it and read some of the docs / tutorials? Don't forget that we all here do all the hard work in our spare time besides normal life, normal job and family. So please also understand, that we must priorise wishes which does not mean we ignore them (as you can see from every change log of every release).
In the end, if some feature is missing - you can implement it yourself. That's the whole idea of OpenSource. So again: Patches?