fix bug about -d 4 not being applied on lines that follow a %s whose string ends in \n, such as all sys_gui

big refactoring #8 : fusion of [hsl] and [vsl] together, and fusion of [hradio] and [vradio] together

* suppress redraws for drawing commands if the group that contains them is getting deleted

remove install-icon rule from install rule, because there's already another icon & desktop file in packages/linux_make/

fix for commit d49dbfcc, which was missing the .h changes. Also removes some unused functions and moves [vu] stuff to g_vumeter.c

refactor : merge t_iem_fstyle_flags and t_iem_init_symargs into t_iemgui. remove type t_iemguidummy. remove fields x_rcv_able, x_snd_able and x_font. removed redundant arg "void *x" in 9 old g_all_guis.c functions. added dummy "send" method to [vu] for consistency.

* update scalar's array elements when drawing instruction attributes or transform changes