remove ui.[ch]
add UI related codes from ui.[ch]
show WebKitGTK detection on console
show GtkHTML detection message
follow changed filename
add SYLPF_ prefix
include missing header for dgettext
add prototype declaration
remove SYLPF_FUNC macros
add missing header for g_strconcat
follow changed filename
report configuration result
add Clang check
add --enable-debug
use common sylpf_ function
remove SYLPF_FUNC
add build error message when no suitable toolkit
use sylpf_ common function
add build error message when no proper toolkit
return immediately if show attach tab option is disabled