Fix theme color

lib/ui/widgets/group_membership_widget.dart

@@ -52,7 +52,7 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
         return _buildVisitorState();
 
       default:
-        throw Exception("Unkonwn grou pmembership level state: $_level");
+        throw Exception("Unkonwn group pmembership level state: $_level");
     }
   }
 
@@ -63,7 +63,7 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
         WidgetSpan(
             child: Icon(Icons.info_outline, size: 12),
             alignment: PlaceholderAlignment.middle),
-        TextSpan(text: " " + tr("Invited") + " "),
+        TextSpan(text: " " + tr("Invited") + " ", style: blackForWhiteTheme()),
         TextSpan(
             text: tr("Accept"),
             style: TextStyle(color: Colors.green),
@@ -107,7 +107,8 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
         WidgetSpan(
             child: Icon(Icons.access_time, size: 12),
             alignment: PlaceholderAlignment.middle),
-        TextSpan(text: " " + tr("Requested") + " "),
+        TextSpan(
+            text: " " + tr("Requested") + " ", style: blackForWhiteTheme()),
         TextSpan(
             text: tr("Cancel"),
             style: TextStyle(color: Colors.blue),
@@ -132,7 +133,6 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
 
   /// Build visitor state
   Widget _buildVisitorState() {
-
     // Check if the user can request membership
     if (group.registrationLevel == GroupRegistrationLevel.CLOSED)
       return Text(tr("Closed registration"));

lib/utils/ui_utils.dart

@@ -274,3 +274,7 @@ void applyNewThemeSettings(BuildContext context) =>
 
 /// Parse emojies
 String parseEmojies(String input) => EmojiParser().emojify(input);
+
+/// Create a white text style for dart heme and a black text otherwise
+TextStyle blackForWhiteTheme() =>
+    TextStyle(color: darkTheme() ? Colors.white : Colors.black);