fix momentary_rot_button

[Valla-Chan]

if csgo treats this ent the same way as it works in p2, then it has an issue which causes you to release the button immediately after pressing it, rather than simulating holding down the key to move. please fix this! example: https://gyazo.com/721c74a3985c84f2d36db35d1b4d7c5b

[vrad-exe]

I think the Portal 2 player just lost the ability to continuously +use things, that would need to be reimplemented.