How to dock everything into just one window?

I hate this style of old Photoshop and the Gimp's interface. On Lazarus, we have anchordockingdsng. What about this?

[fredvs]

Take a look at Menu / Layout.
There are predefined layout, included all docked.

With MSEgui, there is on the right side of each window a grip-panel for anchordocking.
Click on it maintaining the button and move the window in a dock or float it.

Also there are icons on top of the grip-panel to float, stick, ... the windows. (see the hint for each button)