RibbonMessageGroup,example: visual effect improved and bug fixed. #72

Job	Run time
macOS (Shared Library)	3m 19s
Qt 5.15.2 Windows MSVC (Shared Library)	2m 33s
macOS (Static Library)	3m 44s
Ubuntu (Shared Library)	2m 27s
Ubuntu (Static Library)	2m 52s
Windows MinGW (Shared Library)	4m 11s
Windows MinGW (Static Library)	4m 12s
Windows MSVC (Shared Library)	4m 5s
Windows MSVC (Static Library)	3m 22s
	30m 45s

Provide feedback