1.Put commctrl.h into pch precompilation(OCCT conflicts)
2.Replace input wxWidgets to support loss focus verification(STUDIO-8101)
3.Optimize slider interaction and trigger mesh when push up slider(STUDIO-8099)
4.Optimize step loading method, separate import of step and mesh
5.Fix dialog cancel button logic;
6.mesh tasks into sub-threads to prevent blocking the UI;
JIRA: STUDIO-8101 STUDIO-8099
Change-Id: I50bbb43953a5128f358c6880032d20693531333b
Mack
zhou.xu