Now, correct options are shown depending on if there are selected images or not in all functions. Added an horizontal scrollbar to be able to read the full path. Before, when all the images were unselected, the information of the last image selected was shown. Now, all the fields are reseted when we unselect all the images. A function to show messages has been created. All the fields of information about the image has been converted from label to textboxes. Minsize has been added to the main window. Other minor fixes have been added  in the GUI.