* 15.06:
Update changelog
Correct the bottom offset we add when setting the volume for scale to max
Display progress information during processing of layer data
If findObject returns none but object_id != 0 use the selected object
Offset the displayed rotation angle so it does not overlap the mouse cursor
Abort attempts to connect if an error is thrown when connecting to the serial port
Fix recent files on Windows
Defer opening the webbrowser until the next run of the event loop
Disable slicing and platform physics when an operation is being performed
Rework LayerData mesh generation for improved performance
Performance: Only calculate the platform center once, not for every poly
Add application icons for all three platforms
