Add lobby particle slot menus

Replace the particle inventory with a main menu showing the 7 slots and
unlocked presets, a slot editor with a read-only view for locked slots,
and an entry editor with pickers for designs, choices, colours and icons.
Slots are limited to 10 entries and a particles-per-tick budget.

LobbySystem/src/de/steamwar/lobby/particle/design/Designs.java

@@ -93,6 +93,16 @@ public class Designs {
         public int points(ParameterValues values) {
             return values.get(WING_IMAGE).getVectors().length;
         }
+
+        // Wings spawn a particle on every pixel of the image, so they start sparse
+        @Override
+        public void applyDefaults(ParameterValues values) {
+            values.set(EntryParameters.COUNT, 1)
+                    .set(EntryParameters.SPEED, 0.0)
+                    .set(EntryParameters.TICK_MODE, EntryParameters.TickMode.ALWAYS)
+                    .set(EntryParameters.INTERVAL, 20)
+                    .set(EntryParameters.GLIDING, EntryParameters.Gliding.NOT_GLIDING);
+        }
     };
 
     public final ParticleDesign CLOUD = new ParticleDesign("cloud", Material.WHITE_WOOL, "PARTICLE_DESIGN_CLOUD") {