More aesthetic changes

+ Added rules and guidelines to the profile editor
+ Adjusted the title of the profile editor to be more aesthetically pleasing
+ Added a way to detect if the image dimensions were too big, or if the file size was just too large.
+ Fixed connection error message on duplicate UIDs still saying 'Mare'.

MareSynchronos/WebAPI/SignalR/ApiController.cs

@@ -121,7 +121,7 @@ public sealed partial class ApiController : DisposableMediatorSubscriberBase, IM
         {
             Logger.LogWarning("Multiple secret keys for current character");
             _connectionDto = null;
-            Mediator.Publish(new NotificationMessage("Multiple Identical Characters detected", "Your Service configuration has multiple characters with the same name and world set up. Delete the duplicates in the character management to be able to connect to Mare.",
+            Mediator.Publish(new NotificationMessage("Multiple Identical Characters detected", "Your Service configuration has multiple characters with the same name and world set up. Delete the duplicates in the character management to be able to connect.",
                 NotificationType.Error));
             await StopConnection(ServerState.MultiChara).ConfigureAwait(false);
             _connectionCancellationTokenSource?.Cancel();