Sort autocomplete by showing lowercase first

[iboss-ptk]

Resolve part of #302:

• lowercase first, then uppercase

[fonsp]

If it sorts in reverse, does it now give z before a?

[iboss-ptk]

@fonsp It is. Should we go like

lowercase
uppercase
the rest
sorted alphabetically for each bucket instead?

[fonsp]

Yep! Just a style comment: you can use a stable sort algorithm like MergeSort, and sort by a function that just assigns categories:

heuristic(s::String) = if islowercase(firstchar(s))
	1
elseif isuppercase(firstchar(s)
	2
else
	3
end

sorted_completions = sort(completions, by=heuristic, algortihm=MergeSort)

(pseudocode)

[iboss-ptk]

@fonsp cool! I will look into that :D