Fuzzy skin fixes + on/off for first layer (#2903)

* Fixing fuzzy skin so it doesn't exit the desired geometry at line ends
Adding option to enable/disable fuzzy skin on first layer

* Whitespace + removing extra file

src/slic3r/GUI/Tab.cpp

@@ -2109,6 +2109,7 @@ void TabPrint::build()
         optgroup->append_single_option_line("fuzzy_skin");
         optgroup->append_single_option_line("fuzzy_skin_point_distance");
         optgroup->append_single_option_line("fuzzy_skin_thickness");
+        optgroup->append_single_option_line("fuzzy_skin_first_layer");
 
 
         optgroup = page->new_optgroup(L("G-code output"), L"param_gcode");