customable labelstower : replace selected attributs by select all attributs from element table.

I refactor the first sql statement to let the developper define is element structure.
The only mandatory attribut for element table will be id. The rest is up to the developper.

labelstower/getter.py

@@ -26,16 +26,12 @@ def get_selected_elements(id_mandatory_labels: int, id_forbiden_labels: str, num
     if(number_of_mandatory_labels):
         query = '''
                     SELECT 
-                        ELEMENT.id
-                        , element_name 
+                        ELEMENT.*
                     FROM 
                         ELEMENT 
                             INNER JOIN 
                         ELEMENT_LABEL 
                                 ON ELEMENT.id=ELEMENT_LABEL.id_element 
-                            INNER JOIN 
-                        LABEL 
-                                ON ELEMENT_LABEL.id_label=LABEL.id 
                     WHERE 
                             id_label IN ({}) 
                         AND 
@@ -46,10 +42,7 @@ def get_selected_elements(id_mandatory_labels: int, id_forbiden_labels: str, num
                                                 ELEMENT 
                                                     INNER JOIN 
                                                 ELEMENT_LABEL 
-                                                        ON ELEMENT.id=ELEMENT_LABEL.id_element 
-                                                    INNER JOIN 
-                                                LABEL 
-                                                        ON ELEMENT_LABEL.id_label=LABEL.id  
+                                                        ON ELEMENT.id=ELEMENT_LABEL.id_element
                                             WHERE 
                                                 id_label IN ({})) 
                                             GROUP BY id_element