simplify the way window is allowed to steal focus, no longer relying on project.godot. Closes #9459

(cherry picked from commit 533014b88c964044441dc04dce6e757b0776de97)

core/script_debugger_remote.cpp

@@ -130,8 +130,6 @@ void ScriptDebuggerRemote::debug(ScriptLanguage *p_script, bool p_can_continue)
 		ERR_FAIL();
 	}
 
-	OS::get_singleton()->enable_for_stealing_focus(Globals::get_singleton()->get("editor_pid"));
-
 	packet_peer_stream->put_var("debug_enter");
 	packet_peer_stream->put_var(2);
 	packet_peer_stream->put_var(p_can_continue);

editor/editor_run.cpp

@@ -53,8 +53,8 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 		args.push_back(remote_host + ":" + String::num(remote_port));
 	}
 
-	args.push_back("-epid");
-	args.push_back(String::num(OS::get_singleton()->get_process_ID()));
+	args.push_back("-allow_focus_steal_pid");
+	args.push_back(itos(OS::get_singleton()->get_process_ID()));
 
 	if (debug_collisions) {
 		args.push_back("-debugcol");

main/main.cpp

@@ -110,6 +110,8 @@ static int init_screen = -1;
 static bool use_vsync = true;
 static bool editor = false;
 
+static OS::ProcessID allow_focus_steal_pid = 0;
+
 static String unescape_cmdline(const String &p_str) {
 
 	return p_str.replace("%20", " ");
@@ -527,11 +529,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 			} else {
 				goto error;
 			}
-		} else if (I->get() == "-epid") {
+		} else if (I->get() == "-allow_focus_steal_pid") {
 			if (I->next()) {
 
-				int editor_pid = I->next()->get().to_int();
-				Globals::get_singleton()->set("editor_pid", editor_pid);
+				allow_focus_steal_pid = I->next()->get().to_int64();
 				N = I->next()->next();
 			} else {
 				goto error;
@@ -958,6 +959,10 @@ Error Main::setup2() {
 	EditorNode::register_editor_types();
 #endif
 
+	if (allow_focus_steal_pid) {
+		OS::get_singleton()->enable_for_stealing_focus(allow_focus_steal_pid);
+	}
+
 	MAIN_PRINT("Main: Load Scripts, Modules, Drivers");
 
 	register_module_types();