Add delay to "slow motion whilst aiming" so weapon raises at reasonable speed

[gtav-ent]

Currently the slow-mo-whilst-aiming feature kicks in as soon as you begin aiming, but you can't fire for some time until the weapon is raised.

To resolve this, introduce a delay after the first frame where 'is aiming' is true.

Even better, fade in the desired slow mo rate over that time period.

[gtav-ent]

This will be in u25.