Just emit the signal to update the budget rather than trying to figure
out the heirarchy of the UI.
Fixes https://github.com/Khopa/dcs_liberation/issues/581
(cherry picked from commit 7d907aac0f644f55bda42ec916eb2be054aefcf5)
To improve IADS design in campaigns, this differentiates required long
and medium range SAMs. SAMs that must be long range SAMs are defined by
SA-10 or Patriot launchers, while medium range SAMs are defined by SA-2,
SA-3, or Hawk launchers.
Long range SAMs positions will only be populated by long range SAMs
(Patriots and SA-10s), and not all factions have those available. Medium
range SAMs currently comprise all air defenses that are not long range
SAMs, so if the faction includes flak guns in their `sams` property then
flak guns may be spawned at medium range SAM locations.
Base defenses and random SAM locations continue to use either type of
SAM.
