Results: Add window title translate.

src/View/Results/CustomPlot/CustomPlotValuesSelectionDialog.py

 # CustomPlotValuesSelectionDialog.py -- Pamhyr
-# Copyright (C) 2023  INRAE
+# Copyright (C) 2023 - 2024  INRAE
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -30,10 +30,11 @@ class CustomPlotValuesSelectionDialog(PamhyrDialog):
     _pamhyr_name = "Custom Plot Selection"
 
     def __init__(self, parent=None):
+        trad = CustomPlotTranslate()
         super(CustomPlotValuesSelectionDialog, self).__init__(
-            title=self._pamhyr_name,
+            title=trad[self._pamhyr_name],
             options=[],
-            trad=CustomPlotTranslate(),
+            trad=trad,
             parent=parent
         )
 

src/View/Results/CustomPlot/Translate.py

@@ -27,6 +27,10 @@ class CustomPlotTranslate(ResultsTranslate):
     def __init__(self):
         super(CustomPlotTranslate, self).__init__()
 
+        self._dict["Custom Plot Selection"] = _translate(
+            "CustomPlot", "Custom Plot Selection"
+        )
+
         # Value type
 
         self._dict['time'] = _translate(