Control + Backspace to delete previous word

[orhnk]

Summary

Before then default st was using combinations like: ctrl + alt + h or alt + backspace to delete the previous word.

This is a common problem in terminal emulators. (See [0])

All of these problems are solved by remapping the keybinding (In our case its ctrl + backspace)

So here is the mapping I added:

static Key key[] = {
  /*
      ...
  */
  /* keysym           mask            string      appkey appcursor */
  { XK_BackSpace,     ControlMask,    "\x17",          0,    0},
  /*
      ...
  */
}

Which adresses: #51

[0]:
- Kitty
- Alacritty
- Terminal

So on ...

[siduck]

we're good with default mappings like alt+backspace, so i dont think we should add more mappings. You are free to do it in your config