Changed import workflow

-Rearrange favorites in fs dock with drag and drop
-Removed import -> sub-scene, moved to scenetree contextual menu
-Removed import -> re-import , moved and integrated to FS dock
-Added ability in FS dock to re-import more than one resource
simultaneously
-Added ability to drag from native filesystem explorer to Godot, only
works on Windows though
-Removed scene reimport merge options, never worked well. Eventually
merging materials should be re-added
-Added ability to set custom root node type when importing scenes
-Re-Import is now automatic, can be configured back to manual in editor
settings
-Added resource previews in property list for many resource types

core/resource.cpp

@@ -330,6 +330,31 @@ Ref<ResourceImportMetadata> Resource::get_import_metadata() const {
 
 }
 
+#ifdef TOOLS_ENABLED
+
+uint32_t Resource::hash_edited_version() const {
+
+	uint32_t hash = hash_djb2_one_32(get_edited_version());
+
+	List<PropertyInfo> plist;
+	get_property_list(&plist);
+
+	for (List<PropertyInfo>::Element *E=plist.front();E;E=E->next()) {
+
+		if (E->get().type==Variant::OBJECT && E->get().hint==PROPERTY_HINT_RESOURCE_TYPE) {
+			RES res = get(E->get().name);
+			if (res.is_valid()) {
+				hash = hash_djb2_one_32(res->hash_edited_version(),hash);
+			}
+		}
+	}
+
+	return hash;
+
+}
+
+#endif
+
 
 Resource::Resource() {
 
@@ -341,6 +366,8 @@ Resource::Resource() {
 }
 
 
+
+
 Resource::~Resource() {
 
 	if (path_cache!="")