Tweak the message queue maximum size property hint

The minimum slider value no longer allows decreasing the value below
the default, as this can cause things to break in the editor.

The maximum slider value was also increased to 4096 since it can safely
be increased to that value (some add-ons may require it).

This closes #37052.

(cherry picked from commit 8d8c7a9383d40b10f14b26622b496efb4033e12c)

core/message_queue.cpp

@@ -337,14 +337,14 @@ bool MessageQueue::is_flushing() const {
 
 MessageQueue::MessageQueue() {
 
-	ERR_FAIL_COND_MSG(singleton != NULL, "MessageQueue singleton already exist.");
+	ERR_FAIL_COND_MSG(singleton != NULL, "A MessageQueue singleton already exists.");
 	singleton = this;
 	flushing = false;
 
 	buffer_end = 0;
 	buffer_max_used = 0;
 	buffer_size = GLOBAL_DEF_RST("memory/limits/message_queue/max_size_kb", DEFAULT_QUEUE_SIZE_KB);
-	ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/message_queue/max_size_kb", PropertyInfo(Variant::INT, "memory/limits/message_queue/max_size_kb", PROPERTY_HINT_RANGE, "0,2048,1,or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/message_queue/max_size_kb", PropertyInfo(Variant::INT, "memory/limits/message_queue/max_size_kb", PROPERTY_HINT_RANGE, "1024,4096,1,or_greater"));
 	buffer_size *= 1024;
 	buffer = memnew_arr(uint8_t, buffer_size);
 }