Use versioned URL for "Online Documentation" buttons in the editor

This also avoids a redirect, making the page appear to load faster.

(cherry picked from commit 958912a33f18650b7d06fa5157d61e3a528281d3)

editor/editor_node.cpp

@@ -2863,7 +2863,7 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 			emit_signal("request_help_search", "");
 		} break;
 		case HELP_DOCS: {
-			OS::get_singleton()->shell_open("https://docs.godotengine.org/");
+			OS::get_singleton()->shell_open(VERSION_DOCS_URL "/");
 		} break;
 		case HELP_QA: {
 			OS::get_singleton()->shell_open("https://godotengine.org/qa/");

editor/plugins/script_editor_plugin.cpp

@@ -36,6 +36,7 @@
 #include "core/os/keyboard.h"
 #include "core/os/os.h"
 #include "core/project_settings.h"
+#include "core/version.h"
 #include "editor/editor_node.h"
 #include "editor/editor_run_script.h"
 #include "editor/editor_scale.h"
@@ -1067,7 +1068,7 @@ void ScriptEditor::_menu_option(int p_option) {
 			help_search_dialog->popup_dialog();
 		} break;
 		case SEARCH_WEBSITE: {
-			OS::get_singleton()->shell_open("https://docs.godotengine.org/");
+			OS::get_singleton()->shell_open(VERSION_DOCS_URL "/");
 		} break;
 		case WINDOW_NEXT: {
 			_history_forward();