Stock display (#379)

* Display stock quantity more prominently

* Cleanup search widget

* Update for stock_detail widget

* More tweaks

* Change bottom bar icon

* Display boolean parameters appropriately

* Adds ability to edit part parameters

* Bump icon size a bit

* Improvements to filter options

- Allow filtering by "option" type
- To start with, filter stock by status code

* Remove debug message

* Remove getTriState method

- No longer needed
- Remove associated unit tests

* Adjust filters based on server API version

* Muted colors

lib/widget/fields.dart

@@ -154,8 +154,8 @@ class CheckBoxField extends FormField<bool> {
         onSaved: onSaved,
         initialValue: initial,
         builder: (FormFieldState<bool> state) {
+
           return CheckboxListTile(
-            //dense: state.hasError,
             title: label != null ? Text(label, style: labelStyle) : null,
             value: state.value,
             tristate: tristate,