Add .allow_multisession() on menus other than Paginated Menus

[RaymondLWong]

Is it possible to have .allow_multisession() on other menus as well? I find many users try to open a second ButtonMenu without closing or waiting for the previous menu to timeout. I think it's more user friendly if you add and enable .allow_multisession() by default.

[robertwayne]

Yeah, this has been on my list of things to do for a while. It's just been pretty low priority.

Changing the default is something I will be doing in v2, but I will look at a small patch tomorrow to at least make this usable from other menus.