more code completion improvements

-calltip dissapears with more types of keypresses or when pressing ')'
-properly looks into autoloaded scripts or nodes with another script for
script functions/variables/etc.

modules/gdscript/gd_tokenizer.cpp

@@ -1040,7 +1040,7 @@ void GDTokenizerText::advance(int p_amount) {
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////
 
-#define BYTECODE_VERSION 4
+#define BYTECODE_VERSION 5
 
 Error GDTokenizerBuffer::set_code_buffer(const Vector<uint8_t> & p_buffer) {