Add _toggle command

[rtxa]

Info

• This command switches the values ​​of cvar. It takes the current value of the cvar and switch to the next one. To avoid the switch don't go in to a circle, the last value must be repeated twice.

Syntax

• Case 1
  If only the cvar is specified, then switches between 1 and 0.
  _toggle <cvar>
• Case 2
  You can also specify two or more values to switch.
  _toggle <cvar> <val1> <val2> ... [valN]

Examples

_toggle r_drawviewmodel If current value is 1, then switches to 0.
_toggle volume 0.0 0.25 0.5 0.75 1.0 1.0 If volume gets to 1.0, it will not move from there.
_toggle name "Kit fisto" "Neo" "willy wonka" If my current name is 'willy wonka', then it will switch to 'Kit fisto'.

Credits

The feature was taken from rofi's client.