Changed: process pool movement

Changed: process pool movement Disabled move actions on inner pools without lanes. Disabled move actions on process pool labels/headers. Mouse down on a pool or lane (unless the lane is selected) now engages grab, same as canvas behavior. This new behaviour should prevent accidentally moving the pool when you really just wanted to grab the canvas and pan the viewport. Changed: lane reordering Lane reordering is now enabled only when the lane is selected/active, preventing conflicts with grab and pan interactions.