[TF2] fix being unable to detonate stickybombs while switching weapons or attacking with melee

[wgetJane]

Description

fixes ValveSoftware/Source-1-Games/issues/2185

this fixes two sticky det delay bugs:

1) not being able to detonate stickies while swinging your melee

2) if you switch weapons (to either primary or melee) while holding down right-click, your stickies will not detonate until your primary/melee is fully deployed

the 2nd bug was supposed to have been patched by the December 13, 2017 Patch, however the patch doesn't actually work as you can see in the video below

Fixed not being able to detonate stickybombs when switching to melee with secondary attack held down

unfixed:

sticky_det_delay_unfixed.mp4

fixed:

sticky_det_delay_fixed.mp4

crosshair colour note for these videos:
green = no buttons held
red = only left-click held
cyan = only right-click held
magenta = both buttons held

[old702]

is there a similar bug with detonator flare?

[wgetJane]

is there a similar bug with detonator flare?

the detonator flares cannot be detonated at all after you switch weapons, which i think is probably intentional because pyro uses alt-fire for airblast and the detonator flares last for a really short time compared to stickybombs

it is also handled differently so it's out of scope for this pr