chore: reduce padding in learning setting dropdowns (#1772)

lib/pangea/learning_settings/pages/settings_learning_view.dart

@@ -47,7 +47,10 @@ class SettingsLearningView extends StatelessWidget {
             child: Form(
               key: controller.formKey,
               child: Padding(
-                padding: const EdgeInsets.all(16.0),
+                padding: const EdgeInsets.symmetric(
+                  vertical: 16.0,
+                  horizontal: 8.0,
+                ),
                 child: Column(
                   children: [
                     Expanded(
@@ -186,6 +189,7 @@ class SettingsLearningView extends StatelessWidget {
                                   L10n.of(context).publicProfileDesc,
                                 ),
                                 activeColor: AppConfig.activeToggleColor,
+                                contentPadding: EdgeInsets.zero,
                               ),
                             ],
                           ),

lib/pangea/learning_settings/widgets/country_picker_tile.dart

@@ -30,13 +30,19 @@ class CountryPickerDropdownState extends State<CountryPickerDropdown> {
 
   @override
   Widget build(BuildContext context) {
+    final countries = CountryService().getAll();
     return DropdownButtonFormField2<Country>(
-      customButton: widget.learningController.country != null
+      customButton: widget.learningController.country != null &&
+              countries.any(
+                (country) =>
+                    country.name == widget.learningController.country!.name,
+              )
           ? CountryPickerTile(
               widget.learningController.country!,
               isDropdown: true,
             )
           : null,
+      isExpanded: true,
       decoration: InputDecoration(
         labelText: L10n.of(context).countryInformation,
       ),
@@ -44,12 +50,12 @@ class CountryPickerDropdownState extends State<CountryPickerDropdown> {
         maxHeight: 300,
       ),
       items: [
-        ...CountryService().getAll().map(
-              (country) => DropdownMenuItem(
-                value: country,
-                child: CountryPickerTile(country),
-              ),
-            ),
+        ...countries.map(
+          (country) => DropdownMenuItem(
+            value: country,
+            child: CountryPickerTile(country),
+          ),
+        ),
       ],
       onChanged: widget.learningController.changeCountry,
       value: widget.learningController.country,
@@ -94,23 +100,28 @@ class CountryPickerTile extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Row(
+      mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [
-        Text(
-          CountryDisplayUtil.flagEmoji(country.name),
-          style: const TextStyle(fontSize: 25),
-        ),
-        const SizedBox(width: 10),
-        Text(
-          CountryDisplayUtil.countryDisplayName(
-                country.name,
-                context,
-              ) ??
-              '',
-          style: const TextStyle().copyWith(
-            color: Theme.of(context).textTheme.bodyLarge!.color,
-            fontSize: 14,
-          ),
-          overflow: TextOverflow.ellipsis,
+        Row(
+          children: [
+            Text(
+              CountryDisplayUtil.flagEmoji(country.name),
+              style: const TextStyle(fontSize: 25),
+            ),
+            const SizedBox(width: 10),
+            Text(
+              CountryDisplayUtil.countryDisplayName(
+                    country.name,
+                    context,
+                  ) ??
+                  '',
+              style: const TextStyle().copyWith(
+                color: Theme.of(context).textTheme.bodyLarge!.color,
+                fontSize: 14,
+              ),
+              overflow: TextOverflow.ellipsis,
+            ),
+          ],
         ),
         if (isDropdown)
           Icon(

lib/pangea/learning_settings/widgets/p_language_dropdown.dart

@@ -80,7 +80,8 @@ class PLanguageDropdownState extends State<PLanguageDropdown> {
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         DropdownButtonFormField2<LanguageModel>(
-          customButton: widget.initialLanguage != null
+          customButton: widget.initialLanguage != null &&
+                  sortedLanguages.contains(widget.initialLanguage)
               ? LanguageDropDownEntry(
                   languageModel: widget.initialLanguage!,
                   isL2List: widget.isL2List,

lib/pangea/learning_settings/widgets/p_settings_switch_list_tile.dart

@@ -44,6 +44,7 @@ class PSettingsSwitchListTileState
   @override
   Widget build(BuildContext context) {
     return SwitchListTile.adaptive(
+      contentPadding: EdgeInsets.zero,
       value: currentValue,
       title: Text(widget.title),
       activeColor: AppConfig.activeToggleColor,