Sc209/dropdown menus

• Made a class of the review window in the View
• The drop down menu in the review window has now all ShadowTasks (aka trials) which you can view. Really nice. No functionality yet.
• Fixed some things that were ugly. For example, I added underscores to some variable names. Maybe some argue that all the underscores are ugly, but it makes the file way more readable and now the IDE does not complain any more about spelling mistakes.

umbra/controller.py

@@ -11,7 +11,7 @@ class Controller:
     def __init__(self, view, model):
         self._model = model
         self._view = view
-        self._view.actionlistener = self.actionlistener
+        self._view.action_listener = self.action_listener
 
         # File reading and writing supported for .csv only
         self._filereader = CSVReader()
@@ -41,13 +41,13 @@ class Controller:
         """Start program user interface."""
         self._view.display()
 
-    def actionlistener(self, key):
+    def action_listener(self, key):
         """Action listener for view events. Called by View class.
 
         Args:
             key: Identifier for View functionality
         """
-        action, *type_code = key.split(' ')  # type_code is a (possibly empty) list
+        action, *type_code = key.split(' ')
         if action == 'select':
             self._select_files(type_code[0])
         elif action == 'delete':
@@ -91,7 +91,7 @@ class Controller:
         """Set the file paths.
 
         Args:
-            paths: Filepaths.
+            paths: File paths.
             type_code: Role of files ('source' or 'shadow')
         """
         if type_code == 'source':