UX: Show lane label in the lane

Problem: When the width of a pool gets wider (by adding more elements to the right) the label of the lane on the left can be outside the viewport, making it difficult sometime to retain context. Solution: We've retained the current left side lane labels but also added lane labels to the right. The text is smaller font size and is a lighter gray so that it doesn't get confused with the larger black text labels used for the elements in your process model.