change arrow symbols

in the small transcription window, for RTL texts it should be the left arrow which goes to the next line and the right which goes to previous line. This was like this previously but is no more. I think it is much preferable to switch to arrow up and arrow down symbols which can be the same for both RTL and LTR. Also, it should be combined with the keyboard strokes arrow-up and arrow-down as shortcuts, please.