Consider current win height when toggling minimization

The new behaviour is more intuitive when the current layout is not the
result of automatic resizing, e.g. after dragging a status bar.

Author: xyb3rt

plugin/acme.vim

@@ -808,7 +808,7 @@ function s:Minimize(w)
 	if index(col, a:w) == 0
 		let s:tops = s:tops == 1 ? 2 : 1
 	else
-		let s:minimized[a:w] = !s:Minimized(a:w)
+		let s:minimized[a:w] = winheight(a:w) > 1
 	endif
 	call s:Layout(col)
 endfunc