WaitingDialog: Minor fixes.

src/View/InitialConditions/Window.py

@@ -268,7 +268,7 @@ class InitialConditionsWindow(PamhyrWindow):
             )
 
         dlg = WaitingDialog(
-            reading_fn=reading,
+            payload_fn=reading,
             title="waiting_result",
             parent=self
         )

src/View/RunSolver/Window.py

@@ -298,7 +298,7 @@ class SolverLogWindow(PamhyrWindow):
                     logger_exception(e)
 
             dlg = WaitingDialog(
-                reading_fn=reading_fn,
+                payload_fn=reading_fn,
                 title="waiting_result",
                 parent=self
             )
@@ -389,7 +389,7 @@ class SolverLogWindow(PamhyrWindow):
                 )
 
             dlg = WaitingDialog(
-                reading_fn=reading_fn,
+                payload_fn=reading_fn,
                 title="waiting_result",
                 parent=self
             )