Character eye customization, scroll bar in appearance tab character setup. Fixes #2946 (#3403)

* A lot of unfinished work, trying to figure stuff out but it ain't really working

* The eye colors finally work on the sprite!

* Big refactor for HumanoidProfileEditor, crashes upon making a lobby

* Fixed Lobby crashing

* Moves the eye selection box to a new tab, which fixes selection the box from going off-screen and not expanding the bars

* uncommented something I shouldn't have commented out

* Moved eye colors back to the appearance tab, still some ui glitches

* Made it possible to scroll in the appearance tab

* Added "Eye color:" label

* Migrating some deprecated functions into their replacements

* Merged two private sealed classes into one public class, removing duplication

Content.Client/UserInterface/HumanoidProfileEditor.Random.cs

@@ -1,4 +1,4 @@
-using Content.Shared.Preferences;
+using Content.Shared.Preferences;
 using Content.Shared.Prototypes;
 using Content.Shared.Utility;
 using Robust.Shared.Prototypes;
@@ -20,6 +20,7 @@ namespace Content.Client.UserInterface
             UpdateAgeEdit();
             UpdateNameEdit();
             UpdateHairPickers();
+            UpdateEyePickers();
         }
 
         private void RandomizeName()