use get_val for getting values from case recorder for all places in t…

…he dashboard code. Also never read variables that have _OVERRIDE in the name

aviary/visualization/aircraft_3d_model.py

@@ -298,14 +298,15 @@ def get_variable_from_case(self, var_prom_name, units=None):
             Value of the variable.
         """
         try:
-            val = self._final_case[var_prom_name]
+            val = self._final_case.get_val(var_prom_name, units=units)
             return float(val)
         except KeyError as e:
             pass
 
         abs2prom = self._problem_metadata["abs2prom"]
         for abs_name, prom_name in abs2prom["input"].items():
-            if prom_name == var_prom_name:
+            # the phrase "_OVERRIDE" in a variable indicates it is a calculated value that we are discarding
+            if prom_name == var_prom_name and '_OVERRIDE' not in abs_name:
                 val = self._final_case.get_val(abs_name, units=units)
                 return float(val)