Display group members to all users if it is public

lib/ui/screens/authorized_group_page_screen.dart

@@ -58,15 +58,14 @@ class _AuthorizedGroupPageScreenState
         _GroupPageTab(
           widget: (c) => AboutGroupSection(group: _group),
           label: tr("About"),
+        ),
+
+        _GroupPageTab(
+          widget: (c) => GroupMembersSection(groupID: _group.id),
+          label: tr("Members"),
+          visible: _group.isAtLeastModerator || _group.isMembersListPublic,
         )
-      ]..addAll(_group.isAtLeastModerator
-          ? [
-              _GroupPageTab(
-                widget: (c) => GroupMembersSection(groupID: _group.id),
-                label: tr("Members"),
-              ),
-            ]
-          : []);
+      ].where((element) => element.visible).toList();
 
   @override
   void initState() {
@@ -173,12 +172,15 @@ class _AuthorizedGroupPageScreenState
 
 class _GroupPageTab {
   final WidgetBuilder widget;
+  final bool visible;
   final String label;
 
   const _GroupPageTab({
     @required this.widget,
+    this.visible = true,
     @required this.label,
   })  : assert(widget != null),
+        assert(visible != null),
         assert(label != null);
 
   Tab get tab => Tab(text: label);

lib/ui/screens/group_sections/group_members_screen.dart

@@ -58,7 +58,7 @@ class _GroupMembersSectionState extends State<GroupMembersSection> {
     return Stack(
       children: [
         ListView(children: _members.map(_buildGroupMemberTile).toList()),
-        _buildInvitationFAB()
+        _group.isAtLeastModerator ? _buildInvitationFAB() : Container()
       ],
     );
   }
@@ -172,7 +172,7 @@ class __GroupMembershipTileState extends State<_GroupMembershipTile> {
       subtitle: Text(_membershipLevels
           .firstWhere((f) => f.id == widget.membership.level)
           .title),
-      trailing: _buildTrailing(),
+      trailing: widget.group.isAtLeastModerator ? _buildTrailing() : null,
     );
   }
 

lib/ui/widgets/group_membership_widget.dart

@@ -52,7 +52,7 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
         return _buildVisitorState();
 
       default:
-        throw Exception("Unkonwn group pmembership level state: $_level");
+        throw Exception("Unknown group membership level state: $_level");
     }
   }
 
@@ -140,7 +140,6 @@ class _GroupMembershipWidgetState extends SafeState<GroupMembershipWidget> {
     return RichText(
       text: TextSpan(
           text: tr("Request membership"),
-          style: TextStyle(color: Colors.blue),
           recognizer: TapGestureRecognizer()
             ..onTap = () => _requestMembership()),
     );