Fix Custom Specie Name (#1120)

# Description

Custom specie name wouldn't properly update when a different race was
selected, or when you changed profiles.
This fixes that.
Also makes it so the text field is automatically filled with the default
name instead of an empty space.
(and makes the species check less bad 😺 )

Solves #1101

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<details><summary><h1>Media</h1></summary>
<p>

https://gyazo.com/63ba2d8a3456c19c70f25164ae42078d

</p>
</details>

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# Changelog

:cl:
- fix: Custom specie name doesn't disappear in the editor anymore.

Content.Client/Lobby/UI/HumanoidProfileEditor.xaml.cs

@@ -640,6 +640,7 @@ public void SetProfile(HumanoidCharacterProfile? profile, int? slot)
             UpdateSkinColor();
             UpdateSpawnPriorityControls();
             UpdateFlavorTextEdit();
+            UpdateCustomSpecieNameEdit();
             UpdateAgeEdit();
             UpdateEyePickers();
             UpdateSaveButton();
@@ -1206,15 +1207,9 @@ private void UpdateNameEdit()
 
         private void UpdateCustomSpecieNameEdit()
         {
-            if (Profile == null)
-                return;
-
-            _customspecienameEdit.Text = Profile.Customspeciename ?? "";
-
-            if (!_prototypeManager.TryIndex<SpeciesPrototype>(Profile.Species, out var speciesProto))
-                return;
-
-            _ccustomspecienamecontainerEdit.Visible = speciesProto.CustomName;
+            var species = _species.Find(x => x.ID == Profile?.Species) ?? _species.First();
+            _customspecienameEdit.Text = string.IsNullOrEmpty(Profile?.Customspeciename) ? Loc.GetString(species.Name) : Profile.Customspeciename;
+            _ccustomspecienamecontainerEdit.Visible = species.CustomName;
         }
 
         private void UpdateFlavorTextEdit()