Layout stuff

[KillTheMule]

Some thoughts about how we can influence how the menus look:

• Thanks for the columns option. Imho it should not be an option to ask_args, but a part of the options table, so different menus can have a different number of columns.
• I'd generally be interested in more flexible layout possibilities. Maybe you could expose more of the internal functionality as optional function arguments to ask_args or something like that? For example, I'd personally like to compute the number of columns dynamically, depending on the width of the window and the length of the menu entries, and I'd also like them to be "left aligned".
• You're sorting the menu entries by a string comparison. Works so far, but I'd like to do my own sorting. Maybe expose that function and keep string comparison as a default? In my case, I'd like to give indices to the items that define the sorting, because my menu works best when everything is manually sorted.

[hkupty]

I think I can find ways to provide those extension points so that the API can take those or fallback to the actual behavior if not provided.

[hkupty]

A quick feedback: Columnizing per option level requires a major rework on how I deal with options. I feel like I'd better resort to giving you the option of deciding how to columnize based on the session object + current set of options. The same thing should be with the sorting.

So, in short. Items 2 and 3 will be done, item 1 will be solved by 2.