Various cleanup and optimization
- Deleted shameful dead code here and here...
- Accelerated creation of GenBitmap*Button adding some caching for bitmap grayOut
- Replaced lists inside type use dictionary by sets
- Prevented useless type usage checking when unnecessary

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from py_ext import *

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from PythonEditor import PythonEditor

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from PythonFileCTNMixin import PythonFileCTNMixin