EDIT : Turns out by default when the front end code was updated, on all safari browsers it was shifted to mobile mode. So I just had to switch it back (I know this cuz the post had 13 upvotes once.If you still feel this post has absolutely screwed your time then keep downvoting ! No matter what I ask/do that's the only thing I ever got. Go ahead.

Dear MikeMirzayanov All of a sudden today in Safari browser, the side panel as well as the menu tab in the home screen disappeared. Its a bug in front end CSS Javascript. Please look into it Thanks !