- don't use a reserved name (starting with an underscore)
- use a file-local mangled name (starting with two underscores
- use renpy.dynamx to cleanup the variable automatically
(cherry picked from commit 3e86094b0b)
* Converted Astoria's spell training into the new system, and cleaned up the code.
* Improved Astoria's menu layout
* Replaced -hidden- menu feature names with actual the actual feature names
* Refactored Astoria's file structure and naming convention
* Temporarily disabled spell training stats
* Converted Snape's hangout events into the new system, and cleaned up relevant code.
* Fixed unreachable cho_quid_E9 event due to an unintentional jump
* Temporarily disabled Snape's hangout stats
* Added internal counter for queues
* Simplified global vars for event completion checks.
* Temporarily disabled Hermione's statistics menu
* Replaced counter/points checks with status flags.
* Disabled debug profiling for images
