Allow all .h5 files to be opened as statepoints

Author: paulromano

openmc_plotter/main_window.py

@@ -550,7 +550,7 @@ def openStatePoint(self):
             msg_box.exec()
             return
         filename, ext = QFileDialog.getOpenFileName(self, "Open StatePoint",
-                                                    ".", "statepoint*.h5")
+                                                    ".", "*.h5")
         if filename:
             try:
                 self.model.openStatePoint(filename)