fix color.ini malformed line

resources/ui_layout/colors.ini

@@ -19,7 +19,8 @@ Custom = 28CC94
 Mixed = 000000
 Gui_color_dark = 275cad
 Gui_color = 296acc
-Gui_color_light = 3d83edsplash_screen_editor = cars.jpg
+Gui_color_light = 3d83ed
+splash_screen_editor = cars.jpg
 splash_screen_gcodeviewer = prusa-gcodepreview.jpg
 Gui_plater = 3C3C3C
 Gui_plater_grid = D0D0D0