Layer list activates a layer with an earlier button-down event only

[alv]

Steps to reproduce:

• have more than one layer in the layer list, any kind will do
• press mouse button down on the leftmost part of an inactive layer's row (easily happens when you intended to click the "layer visible" toggle next to it), and drag away so as to make it not activate that layer, and release mouse button
• So far so good, active layer stays as it was.
• Now click anywhere in the layer list, and the previous steps "mousedown" layer becomes the active layer

Expected result: the last click should be evaluated on it's own.

[Hb---]

Can not verify this in version 14786. Please see that dragging is possible in the layer list, but seems problematic #12067 too.