QuickDesigner: Adding a Gradient Stop should automatically make this one the current selected

Steps to reproduce:

• have a qml file opened, switch to Designer
• select an item with capabilities of having gradient color (Rectangle or similar)
• set the color to use a gradient

1. click slightly above the gradient line to add another gradient stop
2. select a color

Current behavior:
(1) the last selected color will be the color for the gradient
(2) the most right gradient stop is modified

Expected behavior:
(1) the color is just the current color of the gradient line (but this is the minor issue here, next one is more important, I think)
(2) the color of the last added gradient stop should be modified