Able to remove empty translations

src/model/entry.py

@@ -35,4 +35,16 @@ class Entry(Editable):
     
     def get_measure_text(self):
         return self.measure["text"] if "text" in self.measure else ""
-
+    
+    def remove_translation(self, translation):
+        for sense in self.senses:
+            for cluster in sense.translations:
+                if translation in cluster:
+                    cluster.remove(translation)
+                    return
+            for example in sense.examples:
+                for cluster in example.translations:
+                    if translation in cluster:
+                        cluster.remove(translation)
+                        return
+                    

src/model/translation.py

@@ -38,3 +38,12 @@ class Translation(Editable):
         self.explanation = explanation.textContent if explanation else ""
         self.tags = import_label_list("labelList label", translation_xml)
     
+    def is_empty(self):
+        result = True
+        result = result and self.translation == ""
+        # next two are not checked as the also can not be deleted via gui
+        # result = result and self.source == ""
+        # result = result and self.targetLang == ""
+        result = result and self.explanation == ""
+        result = result and len(self.tags) == 0
+        return result