filedialog window has white text on white background

[NanKeRen2020]

when run the UVR 5 on ubuntu 1604, i found a theme bug but cannot fix it, because i am not good at tcl/tk programming. Instead of fixing the bug, i changed the foreground text color reference to some comments as below https://github.com/rdbende/Azure-ttk-theme/issues/35 https://github.com/thonny/thonny/issues/2072 https://github.com/Anjok07/ultimatevocalremovergui/issues/177 https://github.com/oscarpilote/Ortho4XP/pull/95/commits/369c89733fd85bfcaad1dda2915552e2fc2fa669 so we get a different text color. Someone good at tcl/tk maybe get some hints from the comments and fix the bug.