V1.5.5

1. Modify and open the black screen bug of the project.
2. Improve the handling of dragging controls to frame or labelframe.
3. Cancel the "frame" button in the design view and add a splitter bar.
4. Press shift to drag for proportional scaling.
5. Add "lock" and "unlock" position drag in the control right-click menu.
6. The modification prompt box is displayed at the top.
7. Add the suction line close to the position between the controls.

Author: honghaier-game