Refactory code of MBScene.updateUI() from MBScene.show() - It is too busy to reborn full GUI components of pyink everytime the content being updated. - It is fixed by moveing code about updating of frameline to MBScene._updateUI() and avoid calling MBScene.show() to reduce time for updating frameline.

# -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
# vim: sw=4:ts=8:sts=4
m4datadir = $(datadir)/mb
dist_m4data_DATA = foreach.m4 mb_c_header.m4 mb_c_source.m4
dist_bin_SCRIPTS = svg2code.py