Feature request

[Sebastian Fischmeister <Sebastian Fischmeister uni-konstanz de>]

Hello.

        There's one thing that I am missing for quite some time: I am
using the 'center horizontal' and 'center vertical' features all the
time, but they are that hard to click (deep down in the menu
hierarchy).

It would be perfect if you put these two functions together and create
a shortcut for it.

What do you think about it?

Regards,
   -Sebastian