Add subsequence search to tools

Add it to the following searches:
- Create node.
- Scene tree.
- Inspector properties.
- Classes list in help.
- Quick open.

tools/editor/create_dialog.cpp

@@ -103,7 +103,7 @@ void CreateDialog::add_type(const String& p_type,HashMap<String,TreeItem*>& p_ty
 		item->set_selectable(0,false);
 	} else {
 
-		if (!*to_select && (search_box->get_text()=="" || p_type.findn(search_box->get_text())!=-1)) {
+		if (!*to_select && (search_box->get_text().is_subsequence_ofi(p_type))) {
 			*to_select=item;
 		}
 
@@ -172,7 +172,7 @@ void CreateDialog::_update_search() {
 			bool found=false;
 			String type=I->get();
 			while(type!="" && ObjectTypeDB::is_type(type,base_type) && type!=base_type) {
-				if (type.findn(search_box->get_text())!=-1) {
+				if (search_box->get_text().is_subsequence_ofi(type)) {
 
 					found=true;
 					break;
@@ -194,7 +194,7 @@ void CreateDialog::_update_search() {
 			const Vector<EditorData::CustomType> &ct = EditorNode::get_editor_data().get_custom_types()[type];
 			for(int i=0;i<ct.size();i++) {
 
-				bool show = search_box->get_text()=="" || ct[i].name.findn(search_box->get_text())!=-1;
+				bool show = search_box->get_text().is_subsequence_ofi(ct[i].name);
 
 				if (!show)
 					continue;

tools/editor/editor_help.cpp

@@ -453,7 +453,7 @@ void EditorHelpIndex::_update_class_list() {
 			String type = E->key();
 
 			while(type != "") {
-				if (type.findn(filter)!=-1) {
+				if (filter.is_subsequence_ofi(type)) {
 
 					if (to_select.empty()) {
 						to_select = type;

tools/editor/property_editor.cpp

@@ -2804,7 +2804,7 @@ void PropertyEditor::update_tree() {
 			if (capitalize_paths)
 				cat = cat.capitalize();
 
-			if (cat.findn(filter)==-1 && name.findn(filter)==-1)
+			if (!filter.is_subsequence_ofi(cat) && !filter.is_subsequence_ofi(name))
 				continue;
 		}
 

tools/editor/quick_open.cpp

@@ -126,7 +126,7 @@ void EditorQuickOpen::_parse_fs(EditorFileSystemDirectory *efsd) {
 			path+="/";
 		if (path!="res://") {
 			path=path.substr(6,path.length());
-			if (path.findn(search_box->get_text())!=-1) {
+			if (search_box->get_text().is_subsequence_ofi(path)) {
 				TreeItem *ti = search_options->create_item(root);
 				ti->set_text(0,path);
 				Ref<Texture> icon = get_icon("folder","FileDialog");
@@ -138,7 +138,7 @@ void EditorQuickOpen::_parse_fs(EditorFileSystemDirectory *efsd) {
 
 		String file = efsd->get_file_path(i);
 		file=file.substr(6,file.length());
-		if (ObjectTypeDB::is_type(efsd->get_file_type(i),base_type) && (search_box->get_text()=="" || file.findn(search_box->get_text())!=-1)) {
+		if (ObjectTypeDB::is_type(efsd->get_file_type(i),base_type) && (search_box->get_text().is_subsequence_ofi(file))) {
 
 			TreeItem *ti = search_options->create_item(root);
 			ti->set_text(0,file);

tools/editor/scene_tree_editor.cpp

@@ -386,7 +386,7 @@ bool SceneTreeEditor::_add_nodes(Node *p_node,TreeItem *p_parent) {
 		item->set_as_cursor(0);
 	}
 
-	bool keep= ( filter==String() || String(p_node->get_name()).to_lower().find(filter.to_lower())!=-1 );
+	bool keep= (filter.is_subsequence_ofi(String(p_node->get_name())));
 
 	for (int i=0;i<p_node->get_child_count();i++) {