[Haxe][CodeComplete] Added completion for 'using haxe.EnumTools'. fixes #2759#2760

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SlavaRa:feature/2759_Haxe_CodeComplete_Completion_for_using_haxe_EnumToolsSlavaRa/flashdevelop:feature/2759_Haxe_CodeComplete_Completion_for_using_haxe_EnumToolsCopy head branch name to clipboard