Description of the Issue

After this bug #8471 (PR #8753) there is no way to close all stack of panels with single command/action. The previous behavior has been around for years and some may get used to it, like @Uhf7 #8753 (comment) wrote.

I know it's enough to click [x] a few times ... but I would prefer once (because such an option existed and it is no longer there).

Overall this solution with [x] is better than previouse, but now there is no option to close all :) Maybe with Ctrl (or Shift) + [X] or other key can (even middle buton) do it?

PS, Even for undocked panels when we go to context menu >> Close Alt+F4 command only one panel is close. but when I press Alt+F4 it close all Notepad++ (weird).

Steps to Reproduce the Issue

1. Open few panels in one docked area.
2. How close all with one action?

Generally, we can live without this option, but if it was available that would be fine too. If this feature will be rejected, then this description will be as reference to any future same questions.

Debug Information

Notepad++ v7.9 (32-bit)
Build time : Sep 22 2020 - 03:24:22
Path : D:_test\NPPClean\notepad++.exe
Admin mode : ON
Local Conf mode : ON
OS Name : Windows 7 Ultimate (64-bit)
OS Build : 7601.0
Current ANSI codepage : 1250
Plugins : none