Dependency on shell tab setting causes problems

[fbruetting]

mtr seems to use the user-specific tab width of the shell. If this is set to e.g. tabs -4, mtr’s rendering gets buggy. Please don’t rely on user’s settings.

[rewolff]

Hmm. Odd. I would think that MTR just uses "curses" to render the screen and that it would be "curses" that decides to optimize movement around the sreen by taking advantage of the tabs that you've put elsewhere. Not sure if we can influence that from within the "client" program.