Moved TexifyUtil#getFileTypeByExtension to FileUtil (part 2/2).
Moved TexifyUtil#getFileTypeByExtension to FileUtil (part 2/2).

Ruben-Sten/TeXiFy-IDEA,Ruben-Sten/TeXiFy-IDEA,Ruben-Sten/TeXiFy-IDEA,Ruben-Sten/TeXiFy-IDEA