Visual bug when hovering a panel over another docked panel

[amh4r]

Current Behavior

Dragging a panel over a dock section causes the docked panel to move, which is desired. But when the dragged panel is moved over the "middle" of the dock, the docked panel does not move. The panel tabs move, which is desired.

Desired Behavior

Dragging a panel over a dock should give a preview of what will happen after the panel is dropped.

[soumyart]

The implemented behaviour is as follows:
If one panel is there in dock-

1. Hover the new panel over top section, existing Panel will be pushed down.
2. Hover the new panel over bottom section, existing Panel will be pushed up.
3. Hover the new panel in middle section (~120px height in middle section), existing panel will be full docked with dock tab visible. And if released new panel will be docked and will be the active dock tab.

Any other combination of panels in dock-

1. New panel will always be preview as docked with dock tab visible and if released will be the active tab.