Change 2D navigation ProjectSettings from integers to floats

Changes 2D navigation ProjectSettings from integers to floats.

doc/classes/ProjectSettings.xml

@@ -1943,13 +1943,13 @@
 		<member name="memory/limits/multithreaded_server/rid_pool_prealloc" type="int" setter="" getter="" default="60">
 			This is used by servers when used in multi-threading mode (servers and visual). RIDs are preallocated to avoid stalling the server requesting them on threads. If servers get stalled too often when loading resources in a thread, increase this number.
 		</member>
-		<member name="navigation/2d/default_cell_size" type="int" setter="" getter="" default="1">
+		<member name="navigation/2d/default_cell_size" type="float" setter="" getter="" default="1.0">
 			Default cell size for 2D navigation maps. See [method NavigationServer2D.map_set_cell_size].
 		</member>
-		<member name="navigation/2d/default_edge_connection_margin" type="int" setter="" getter="" default="1">
+		<member name="navigation/2d/default_edge_connection_margin" type="float" setter="" getter="" default="1.0">
 			Default edge connection margin for 2D navigation maps. See [method NavigationServer2D.map_set_edge_connection_margin].
 		</member>
-		<member name="navigation/2d/default_link_connection_radius" type="int" setter="" getter="" default="4">
+		<member name="navigation/2d/default_link_connection_radius" type="float" setter="" getter="" default="4.0">
 			Default link connection radius for 2D navigation maps. See [method NavigationServer2D.map_set_link_connection_radius].
 		</member>
 		<member name="navigation/2d/use_edge_connections" type="bool" setter="" getter="" default="true">

servers/navigation_server_3d.cpp

@@ -185,10 +185,10 @@ NavigationServer3D::NavigationServer3D() {
 	ERR_FAIL_COND(singleton != nullptr);
 	singleton = this;
 
-	GLOBAL_DEF_BASIC("navigation/2d/default_cell_size", 1);
+	GLOBAL_DEF_BASIC("navigation/2d/default_cell_size", 1.0);
 	GLOBAL_DEF("navigation/2d/use_edge_connections", true);
-	GLOBAL_DEF_BASIC("navigation/2d/default_edge_connection_margin", 1);
-	GLOBAL_DEF_BASIC("navigation/2d/default_link_connection_radius", 4);
+	GLOBAL_DEF_BASIC("navigation/2d/default_edge_connection_margin", 1.0);
+	GLOBAL_DEF_BASIC("navigation/2d/default_link_connection_radius", 4.0);
 
 	GLOBAL_DEF_BASIC("navigation/3d/default_cell_size", 0.25);
 	GLOBAL_DEF_BASIC("navigation/3d/default_cell_height", 0.25);