Edit Slider: when handles switch sides, input focus should switch as well

[CoDEmanX]

On the demo page, enter a value for the right handle which is lower than the value of the left handle. Hit return and see the handles switching sides. Cursor will however remain in the right handle's input field, but it focus should be on the left one now.

[mattscotty]

not sure if this is the same issue, but ive noticed that that sometimes after dragging, labels end up the wrong way around;