fix(gui): Fixed AboutDialog logo image path

Author: JohannesErnst

source/rafcon/gui/assets/logo/RAFCON_Logo_Farbe_RGB_negativ_small.png

@@ -8,6 +8,7 @@ SOURCE_VIEW_FOLDER: $RELATIVE_PATH{../share/gtksourceview-3.0}
 # overwrites gui_config.SOURCE_EDITOR_STYLE
 SOURCE_VIEW_THEME: rafcon-dark
 ICONS_FOLDER: $RELATIVE_PATH{../share/icons}
+LOGO_FOLDER: $RELATIVE_PATH{assets/logo}
 SPLASH_SCREEN_FOLDER: $RELATIVE_PATH{assets/splashscreens}
 SPLASH_SCREEN_RESOLUTION_WIDTH: 530
 SPLASH_SCREEN_RESOLUTION_HEIGHT: 350

source/rafcon/gui/design_config.yaml

@@ -14,6 +14,7 @@
 from gi.repository import Gtk
 from gi.repository import GdkPixbuf
 import rafcon
+from rafcon.gui.design_config import global_design_config
 
 
 class AboutDialogView(Gtk.AboutDialog):
@@ -26,5 +27,6 @@ def __init__(self):
                           "Annika Wollschläger", "Benno Voggenreiter", "Matthias Büttner", "Mahmoud Akl"))
         self.set_copyright("DLR")
         self.set_license("Eclipse Public License 1.0")
-        self.set_logo(GdkPixbuf.Pixbuf.new_from_file('documents/logo/bitmap/RAFCON_Logo_Farbe_RGB_negativ_small.png'))
+        splash_screen_path = global_design_config.get_config_value("LOGO_FOLDER")+'/RAFCON_Logo_Farbe_RGB_negativ_small.png'
+        self.set_logo(GdkPixbuf.Pixbuf.new_from_file(splash_screen_path))
         self.set_website("https://github.com/DLR-RM/RAFCON")