FIX: hide line if recovery is 0 on mana flask (#8239)

Author: Paliak

src/Classes/ItemsTab.lua

@@ -3292,13 +3292,13 @@ function ItemsTabClass:AddItemTooltip(tooltip, item, slot, dbMode)
 			end
 		end
 		if flaskData.manaTotal then
-			if flaskData.manaGradual then
+			if flaskData.manaGradual ~= 0 then
 				tooltip:AddLine(16, s_format("^x7F7F7FRecovers %s%d ^x7F7F7FMana over %s%.1f0 ^x7F7F7FSeconds",
 					main:StatColor(flaskData.manaTotal, base.flask.mana), flaskData.manaGradual,
 					main:StatColor(flaskData.duration, base.flask.duration), flaskData.duration
 					))
 			end
-			if flaskData.manaInstant then
+			if flaskData.manaInstant ~= 0 then
 				tooltip:AddLine(16, s_format("^x7F7F7FRecovers %s%d ^x7F7F7FMana instantly", main:StatColor(flaskData.manaTotal, base.flask.mana), flaskData.manaInstant))
 			end
 		end