Close writer before using renameTo, it was failing on windows. Also try a fallback way in case renameTo fails.
Capture exception in case there is one missing attribute in the window properties.
Hecho publico el metodo setExclusiveUIExtension.
Modificaciones para dar soporte a que una Extension tenga el control exclusivo del UI (visibilidad/habilitado)
theme
theme y exclusiveExtension
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