Fix debug logging - use state module for global_debug

- text.py had local global_debug variable that shadowed the state module
- Changed text.py to import get_global_debug from state module
- Changed set_global_debug() in text.py to call state module's function
- Changed all 'if global_debug:' to 'if get_global_debug():' in text.py
- log.py was already using get_global_debug() correctly