Move metadata configuration features from Pro to Basic

Configuring how the metadata should be saved really seems like more of a
basic feature as it allows you test GitJournal's compatibility with your
favorite desktop client or for static website generation.

changelog.yml

@@ -3,6 +3,7 @@
   improvements:
     - text: "Allow SSH Keys to be loaded from the FS - #74"
       image: ssh_key_file.jpeg
+    - text: "Move metadata configuration features from Pro to Basic"
   bugs:
     - text: "Dark Theme: Render checkboxes in a lighter color"
     - text: "Fix Relative Parent links not working - #256"

lib/features.dart

@@ -127,7 +127,7 @@ class Feature {
     DateTime(2020, 01, 05),
     tr("feature.yamlModifiedKey"),
     "",
-    true,
+    false,
   );
 
   static final noteSorting = Feature(
@@ -287,7 +287,7 @@ class Feature {
     DateTime(2020, 07, 30),
     tr("feature.metaDataTitle"),
     "",
-    true,
+    false,
   );
 
   static final yamlCreatedKey = Feature(
@@ -295,7 +295,7 @@ class Feature {
     DateTime(2020, 08, 02),
     tr("feature.yamlCreatedKey"),
     "",
-    true,
+    false,
   );
 
   static final yamlTagsKey = Feature(
@@ -303,7 +303,7 @@ class Feature {
     DateTime(2020, 08, 06),
     tr("feature.yamlTagsKey"),
     "",
-    true,
+    false,
   );
 
   static final customMetaData = Feature(

lib/screens/settings_note_metadata.dart

@@ -88,9 +88,7 @@ class _NoteMetadataSettingsScreenState
             });
           },
         ),
-        ProOverlay(
-          feature: Feature.yamlModifiedKey,
-          child: ListPreference(
+        ListPreference(
           title: tr("settings.noteMetaData.modified"),
           options: [
             "modified",
@@ -107,10 +105,7 @@ class _NoteMetadataSettingsScreenState
           },
           enabled: settings.yamlHeaderEnabled,
         ),
-        ),
-        ProOverlay(
-          feature: Feature.yamlCreatedKey,
-          child: ListPreference(
+        ListPreference(
           title: tr("settings.noteMetaData.created"),
           options: [
             "created",
@@ -125,10 +120,7 @@ class _NoteMetadataSettingsScreenState
           },
           enabled: settings.yamlHeaderEnabled,
         ),
-        ),
-        ProOverlay(
-          feature: Feature.yamlTagsKey,
-          child: ListPreference(
+        ListPreference(
           title: tr("settings.noteMetaData.tags"),
           options: [
             "tags",
@@ -143,10 +135,7 @@ class _NoteMetadataSettingsScreenState
           },
           enabled: settings.yamlHeaderEnabled,
         ),
-        ),
-        ProOverlay(
-          feature: Feature.metaDataTitle,
-          child: ListPreference(
+        ListPreference(
           title: tr("settings.noteMetaData.titleMetaData.title"),
           options: [
             tr("settings.noteMetaData.titleMetaData.fromH1"),
@@ -164,7 +153,6 @@ class _NoteMetadataSettingsScreenState
             });
           },
         ),
-        ),
         ProOverlay(
           feature: Feature.customMetaData,
           child: CustomMetDataTile(