[#179] Refactored folder deletion so that it uses selection in the core's directory_tree instead of using the one from the GUI layer.

cocoa/inter/app.py

@@ -38,9 +38,6 @@ class PyDupeGuruBase(PyFairware):
     def addDirectory_(self, directory):
         return self.py.add_directory(directory)
     
-    def removeDirectory_(self, index):
-        self.py.remove_directory(index)
-    
     #---Results
     def clearIgnoreList(self):
         self.py.scanner.ignore_list.Clear()

cocoa/inter/directory_outline.py

@@ -8,6 +8,9 @@ class PyDirectoryOutline(PyOutline):
     def addDirectory_(self, path):
         self.py.add_directory(path)
     
+    def removeSelectedDirectory(self):
+        self.py.remove_selected()
+    
     # python --> cocoa
     def refresh_states(self):
         # Under cocoa, both refresh() and refresh_states() do the same thing.