BUG: flex-direction: column & float: left make sorter direction incorrect

[YumiChen]

Version:0.16.45

Are you able to reproduce the bug from the demo?

• [x] Yes
• [ ] No

What is the expected behavior? Given a parent element with display: flex and flex-direction: column styles, with the child elements having float: left styles, the sorter should be horizontal, for in the result the elements are aligned vertically.

What is the current behavior? The sorter would be vertical.

Are you able to attach screenshots, screencasts or a live demo?

• [x] Yes (attach)
• [ ] No

https://jsfiddle.net/fzb4u7rd/