Started 4.9 Version file.

When dragging tiles, press the ALT key to avoid drag-n-drop and just simply move. (Cursor restores to original state). This allows one to move the tiles off the pane to hidden areas. Currently you must press ALT *after* starting the move, since ALT-clicking on a tile will 'jump down' into the network once released. This will be resolved at a later date.

Clicking on 'Jump to Export Chop' in floating parameter window coredump fixed.

Mechanism added to allow specific behaviour when drag-n-dropping to specific op parameters.