Increase preview offset for BagFenceRound and Safe

Collisions with the player caused sliding when the safe was pitched
forward. It was the same issue with proning against the sandbag. #1945

Note the player can still cause collision sliding by using snap to get
the preview closer to them.

SQF/dayz_code/Configs/CfgVehicles/DZE/VaultStorage.hpp

@@ -21,7 +21,7 @@ class VaultStorageLocked: Land_A_tent {
 	transportMaxMagazines = 0;
 	transportMaxWeapons = 0;
 	transportMaxBackpacks = 0;
-	offset[] = {0,1.5,0};
+	offset[] = {0,2.5,0};
 	lockable = 4;
 	unlockedClass = "VaultStorage";
 	requireplot = 0;