Refactor layer property editor grid

- Now able to display up to 32 layers in physics (still 20 for render)
- Adjustable grid size to fit available space in dock
- Expansion icon to display more layers vertically
- Layer numbers in cells to help with selection

doc/classes/ProjectSettings.xml

@@ -665,9 +665,45 @@
 		<member name="layer_names/2d_physics/layer_20" type="String" setter="" getter="" default="&quot;&quot;">
 			Optional name for the 2D physics layer 20.
 		</member>
+		<member name="layer_names/2d_physics/layer_21" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 21.
+		</member>
+		<member name="layer_names/2d_physics/layer_22" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 22.
+		</member>
+		<member name="layer_names/2d_physics/layer_23" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 23.
+		</member>
+		<member name="layer_names/2d_physics/layer_24" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 24.
+		</member>
+		<member name="layer_names/2d_physics/layer_25" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 25.
+		</member>
+		<member name="layer_names/2d_physics/layer_26" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 26.
+		</member>
+		<member name="layer_names/2d_physics/layer_27" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 27.
+		</member>
+		<member name="layer_names/2d_physics/layer_28" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 28.
+		</member>
+		<member name="layer_names/2d_physics/layer_29" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 29.
+		</member>
 		<member name="layer_names/2d_physics/layer_3" type="String" setter="" getter="" default="&quot;&quot;">
 			Optional name for the 2D physics layer 3.
 		</member>
+		<member name="layer_names/2d_physics/layer_30" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 30.
+		</member>
+		<member name="layer_names/2d_physics/layer_31" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 31.
+		</member>
+		<member name="layer_names/2d_physics/layer_32" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 2D physics layer 32.
+		</member>
 		<member name="layer_names/2d_physics/layer_4" type="String" setter="" getter="" default="&quot;&quot;">
 			Optional name for the 2D physics layer 4.
 		</member>
@@ -785,9 +821,45 @@
 		<member name="layer_names/3d_physics/layer_20" type="String" setter="" getter="" default="&quot;&quot;">
 			Optional name for the 3D physics layer 20.
 		</member>
+		<member name="layer_names/3d_physics/layer_21" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 21.
+		</member>
+		<member name="layer_names/3d_physics/layer_22" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 22.
+		</member>
+		<member name="layer_names/3d_physics/layer_23" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 23.
+		</member>
+		<member name="layer_names/3d_physics/layer_24" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 24.
+		</member>
+		<member name="layer_names/3d_physics/layer_25" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 25.
+		</member>
+		<member name="layer_names/3d_physics/layer_26" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 26.
+		</member>
+		<member name="layer_names/3d_physics/layer_27" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 27.
+		</member>
+		<member name="layer_names/3d_physics/layer_28" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 28.
+		</member>
+		<member name="layer_names/3d_physics/layer_29" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 29.
+		</member>
 		<member name="layer_names/3d_physics/layer_3" type="String" setter="" getter="" default="&quot;&quot;">
 			Optional name for the 3D physics layer 3.
 		</member>
+		<member name="layer_names/3d_physics/layer_30" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 30.
+		</member>
+		<member name="layer_names/3d_physics/layer_31" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 31.
+		</member>
+		<member name="layer_names/3d_physics/layer_32" type="String" setter="" getter="" default="&quot;&quot;">
+			Optional name for the 3D physics layer 32.
+		</member>
 		<member name="layer_names/3d_physics/layer_4" type="String" setter="" getter="" default="&quot;&quot;">
 			Optional name for the 3D physics layer 4.
 		</member>