userjoined improvements, feathub#135

NadekoBot.Core/Modules/Administration/Services/LogCommandService.cs

@@ -711,8 +711,10 @@ namespace NadekoBot.Modules.Administration.Services
                     var embed = new EmbedBuilder()
                         .WithOkColor()
                         .WithTitle("✅ " + GetText(logChannel.Guild, "user_joined"))
-                        .WithDescription($"{usr}")
+                        .WithDescription($"{usr.Mention} `{usr}`")
                         .AddField(efb => efb.WithName("Id").WithValue(usr.Id.ToString()))
+                        .AddField(fb => fb.WithName(GetText(logChannel.Guild, "joined_server")).WithValue($"{usr.JoinedAt?.ToString("dd.MM.yyyy HH:mm") ?? "?"}").WithIsInline(true))
+                        .AddField(fb => fb.WithName(GetText(logChannel.Guild, "joined_discord")).WithValue($"{usr.CreatedAt:dd.MM.yyyy HH:mm}").WithIsInline(true))
                         .WithFooter(efb => efb.WithText(CurrentTime(usr.Guild)));
 
                     if (Uri.IsWellFormedUriString(usr.GetAvatarUrl(), UriKind.Absolute))

src/NadekoBot/_strings/ResponseStrings.en-US.json

@@ -589,6 +589,8 @@
   "utility_invalid_value": "Invalid {0} value.",
   "utility_joined_discord": "Joined Discord",
   "utility_joined_server": "Joined server",
+  "administration_joined_discord": "Joined Discord",
+  "administration_joined_server": "Joined server",
   "utility_listservers": "ID: {0}\nMembers: {1}\nOwner ID: {2}",
   "utility_listservers_none": "No servers found on that page.",
   "utility_list_of_repeaters": "List of repeater",