Makes trees transparent if important objects are hiding behind them (#18627)

* tree!

* Update code/modules/admin/verbs/freeze.dm

* yeet

* steel review, animate transparency

* more critical items

* charlie review

* charlie

code/game/gamemodes/blob/theblob.dm

@@ -9,6 +9,7 @@
 	anchored = TRUE
 	max_integrity = 30
 	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 0, RAD = 0, FIRE = 80, ACID = 70)
+	flags_2 = CRITICAL_ATOM_2
 	var/point_return = 0 //How many points the blob gets back when it removes a blob of that type. If less than 0, blob cannot be removed.
 	var/health_timestamp = 0
 	var/brute_resist = 0.5 //multiplies brute damage by this

code/game/gamemodes/nuclear/nuclearbomb.dm

@@ -18,7 +18,7 @@ GLOBAL_VAR(bomb_set)
 	icon_state = "nuclearbomb0"
 	density = TRUE
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF
-	flags_2 = NO_MALF_EFFECT_2
+	flags_2 = NO_MALF_EFFECT_2 | CRITICAL_ATOM_2
 	anchored = TRUE
 	var/extended = TRUE
 	var/lighthack = FALSE