More automated renaming.
ActiveCaptions -> ActiveText
BitmapCaption -> BitmapText
ContentCaption -> ContentText
ContentTextCaption -> ContentStringText
TextCaptionFileContent -> StringTextFileContent
TextCaptionFileDecoder -> StringTextFileDecoder
TextCaptionFile -> StringTextFile
TextCaption -> StringText
PlayerCaption -> PlayerText
CaptionContent -> TextContent
CaptionDecoder -> TextDecoder
CaptionPanel -> TextPanel
CaptionView -> TextView
CaptionAppearanceDialog -> SubtitleAppearanceDialog
CaptionType -> TextType