Container example

[rasatpc]

I named this panel example "Container" for the Google search. Besides manpages, no information describes Container's unique options that form into any size, shape, and number of buttons. To control functions and application selection in one place. Also, how easy it is to create a Container.

[rasatpc]

The configurations are tested, works fine.
One question. What determines the Container's width x height e.g. (2x2, Container(Columns 4))? The items' width x height are self-explanatory. e.g. (2x1, Title "4").

[rasatpc]

What determines the Container's width x height

Reply to my question. I found no reason to define the Container's width x height. It does the Columns and Rows, and the items define the buttons. I have corrected the configurations in PR correction.