Fix PVWatts-Battery REopt in UI callback

When REopt API returns null battery size and user clicks **Yes** when asked whether to set battery size to zero, set battery size to zero instead of resetting to original size.

deploy/runtime/ui/Battery Model Simple with REopt.json

@@ -781,13 +781,15 @@
         "\t\t\t\"\\nOptimal power (kW): \" + to_string(0) + \"\\n\\nReplace \" + ",
         "\t\t\t\"'Battery capacity' and 'Battery power' with results from REopt?\";",
         "\t\tapply = yesno(apply_str);",
-        "\t\tif (apply){",
+        "\t\tif (apply) {",
         "\t\t\tvalue('batt_simple_kw', 0.0);",
         "\t\t\tvalue('batt_simple_kwh', 0.0);",
-        "\t\t}",
+        "\t\t}\r",
+        "\t\telse {",
         "\t\tvalue(\"batt_simple_dispatch\",dispatch_original_mode); //restore original dispatch mode for early exit from ReOPT",
         "\t\tvalue(\"batt_simple_kw\", batt_kw_original);",
-        "\t\tvalue(\"batt_simple_kwh\", batt_kwh_original); ",
+        "\t\tvalue(\"batt_simple_kwh\", batt_kwh_original); \r",
+        "\t\t}",
         "\t\texit;",
         "\t}",
         "",