Fix Flavor Text editor not saving correctly (#28122)

* Check for flavor text equality in profile.

* Fix some characters being deleted from flavor text

Sometimes the last few characters of the flavor text would get deleted. This fixes this issue.

Content.Client/FlavorText/FlavorText.xaml.cs

@@ -17,7 +17,7 @@ namespace Content.Client.FlavorText
 
             var loc = IoCManager.Resolve<ILocalizationManager>();
             CFlavorTextInput.Placeholder = new Rope.Leaf(loc.GetString("flavor-text-placeholder"));
-            CFlavorTextInput.OnKeyBindDown  += _ => FlavorTextChanged();
+            CFlavorTextInput.OnTextChanged  += _ => FlavorTextChanged();
         }
 
         public void FlavorTextChanged()

Content.Shared/Preferences/HumanoidCharacterProfile.cs

@@ -387,6 +387,7 @@ namespace Content.Shared.Preferences
             if (!_antagPreferences.SequenceEqual(other._antagPreferences)) return false;
             if (!_traitPreferences.SequenceEqual(other._traitPreferences)) return false;
             if (!Loadouts.SequenceEqual(other.Loadouts)) return false;
+            if (FlavorText != other.FlavorText) return false;
             return Appearance.MemberwiseEquals(other.Appearance);
         }