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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<?xml version="1.0" encoding="UTF-8"?>

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<BeremizRoot URI_location="LOCAL://">

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  <TargetType/>

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</BeremizRoot>