feat(#691): add filter for missing guidelines

* Add own file for FilterButton
* Make lookup fetching even better debuggable (not sure why this
  is making problems the whole time)

app/lib/common/utilities/genome_data.dart

@@ -38,7 +38,8 @@ Future<void> _saveDiplotypeAndActiveDrugsResponse(
 }
 
 Future<void> updateGenotypeResults() async {
-  if (!shouldUpdateGenotypeResults()) return;
+  final skipUpdate = !shouldUpdateGenotypeResults();
+  if (skipUpdate) return;
   // fetch lookups
   final response = await get(Uri.parse(cpicLookupUrl));
   if (response.statusCode != 200) throw Exception();

app/lib/common/widgets/drug_list/cubit.dart

@@ -124,13 +124,7 @@ class FilterState {
   bool isAccepted(Drug drug, ActiveDrugs activeDrugs, {
     required bool useDrugClass,
   }) {
-    var warningLevelMatches = showWarningLevel[drug.warningLevel] ?? true;
-    // WarningLevel.none is also shown in green in app; therefore, it should
-    // also be filtered with green option
-    if (drug.warningLevel == WarningLevel.none) {
-      warningLevelMatches = warningLevelMatches &&
-        showWarningLevel[WarningLevel.green]!;
-    }
+    final warningLevelMatches = showWarningLevel[drug.warningLevel] ?? true;
     final isDrugAccepted =
       drug.matches(query: query, useClass: useDrugClass) &&
       (activeDrugs.contains(drug.name) || showInactive) &&

app/lib/common/widgets/drug_search/filter_button.dart

@@ -0,0 +1,12 @@
+import '../../module.dart';
+
+class FilterButton extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return IconButton(
+      icon: Icon(Icons.filter_list),
+      color: PharMeTheme.iconColor,
+      onPressed: Scaffold.of(context).openDrawer,
+    );
+  }
+}

app/lib/common/widgets/drug_search/filter_menu.dart

@@ -1,16 +1,5 @@
 import '../../module.dart';
 
-class FilterButton extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return IconButton(
-      icon: Icon(Icons.filter_list),
-      color: PharMeTheme.iconColor,
-      onPressed: Scaffold.of(context).openDrawer,
-    );
-  }
-}
-
 class FilterMenuItem {
   FilterMenuItem({
     required bool initialValue,
@@ -29,6 +18,7 @@ class FilterMenuItem {
   set value(newValue) => _value = newValue;
   bool get value => _value;
 }
+
 class FilterMenu extends HookWidget {
   const FilterMenu(this.cubit, this.state, this.activeDrugs, {
     required this.useDrugClass
@@ -125,7 +115,6 @@ class FilterMenu extends HookWidget {
     return [
       buildDrugStatusItem(),
       ...WarningLevel.values
-        .filter((warningLevel) => warningLevel != WarningLevel.none)
         .map(buildWarningLevelItem),
     ];
   }

app/lib/common/widgets/module.dart

@@ -8,6 +8,7 @@ export 'drug_list/builder.dart';
 export 'drug_list/cubit.dart';
 export 'drug_list/drug_items/drug_cards.dart';
 export 'drug_search/builder.dart';
+export 'drug_search/filter_button.dart';
 export 'drug_search/filter_data_wrapper.dart';
 export 'drug_search/filter_menu.dart';
 export 'error_handler.dart';