Update 1.07

Today I've launched a few minor tweaks for a smoother experience.

• Bugfix: Opening the Steam Overlay no longer triggers the Run One Step feature. This was being triggered because it's bound to Tab, but it now won't trigger if any modifiers (Shift etc) are pressed.

• Bugfix: The This Is Fine achievement no longer gets awarded when it shouldn't.

• I've removed the Replay Error button from the failure popup. It doesn't really add anything on top of the rewind system, and it was confusing some new players.

• Coloured Panels can no longer be placed in the rear workstation slot. There's no reason to do so, since there's no way to bounce a laser off them in that position.

• I've improved the way old solutions are loaded. Previously if a solution was invalid (if, say, you've got a Coloured Panel in the rear position), or if an invalid setup existed in the Undo/Redo history, then the game would reject it and load a fresh solution. With the new version, if the problem is only in the Undo/Redo history, not the current setup, the solution will be loaded without the history.