Implement a workaround for the button class. However, this won't solve all issues. We can use this as example to fix the mouse out event issue. When we move the curosr over the text inside the button. The upper layer group will receive MOUSE_OUT events. This is absolute incorrect.

SUBDIRS = src include tools examples
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = libmbfly.pc
EXTRA_DIST = libmbfly.pc.in mb Doxyfile README.h