FLUX Studio 0.9.15

Add:
Support Beambox color mode and multi layer copy and paste

Fix:
Delta engraving feature image resizing

Improve:
Improve resolution of DXF
Reduce Beambox bitmap memory usage

FLUX Studio 0.9.14

Add
Add dpi parameter to improve engraving resolution and speed

Improve
Stop Beambox regional preview when error happens
Improve Beambox preview mode stability

Fix
Fix version compare problem
Fix Beambox left panel state problem