Fish Market update. Better description for boosts and train savior item (#389)

* Changed small-plane

* Updated boost description

* Clarified train savior item from market

* Fixed SHIFT click on train savior item

features/fish_market.lua

@@ -322,6 +322,12 @@ local function market_item_purchased(event)
         boost_player_miningspeed(player, market)
     end
 
+    if event.offer_index == 3 then -- train saviour item
+        local player = Game.get_player_by_index(player_index)
+        local train_savior_item = Market_items[offer_index].item
+        player.insert{name=train_savior_item, count=event.count}
+    end
+
     --[[
   if event.offer_index == 2 then
     player.remove_item({name="small-plane", count=event.count})

features/train_saviour.lua

@@ -10,8 +10,8 @@ local saviour_token_name = 'small-plane' -- item name for what saves players
 local saviour_timeout = 180 -- number of ticks players are train immune after getting hit (roughly)
 
 table.insert(
-    Market_items,
-    {price = {{Market_items.market_item, 100}}, offer = {type = 'give-item', item = saviour_token_name}}
+    Market_items, 3,
+    {price = {{Market_items.market_item, 100}}, offer = {type = 'nothing', effect_description = 'Train Immunity (+1 ' .. saviour_token_name .. ')\nEach ' .. saviour_token_name .. ' in your inventory will save you\nfrom being killed by a train once\n\nPrice: 100 '..Market_items.market_item..'s'}, item = saviour_token_name}
 )
 
 local remove_stack = {name = saviour_token_name, count = 1}