cleanup svgui example

Fix bug with two or more wires connected to one input. Now only one wire can be connected to one input, except BOOLean signals in LD and SFC. If user trying to connect wire with already connected input, wire highlight will become red.
Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>

fix issue with sequence of multiple whitespaces in makefile command
line from project configuration

for every additional whitespace '""' was inserted in result command line.