Fixes a bug that can cause incorrect tabs to be pre-selected (possibly causing...

Fixes a bug that can cause incorrect tabs to be pre-selected (possibly causing a crash) when the Inventory dialog is re-invoked.
(This is triggered when the new dialog instance is missing some tabs present in the previous instance.)

Tabs carried over from re-instantiation are matched by the "kind" field instead of by tab number, with special handling to ensure that all tabs are selected if the "all" tag (if present), was selected.

game/engines/default/engine/ui/Inventory.lua

@@ -75,12 +75,26 @@ function _M:generate()
 		end
 
 		self.c_tabs.no_keyboard_focus = true
-		if _M._last_tabs then
-			for _, l in ipairs(_M._last_tabs) do self.c_tabs.dlist[l[1]][l[2]].selected = true end
-			if _M._last_tabs_i then self.c_tabs.sel_i = _M._last_tabs_i end
-		else
+
+		local found_tab = false
+		if _M._last_tabs then -- reselect previously selected tabs if possible
+			local sel_all = _M._last_tabs.all
+			local last_kinds = {}
+			for _, lt in ipairs(_M._last_tabs) do if lt.kind then last_kinds[lt.kind] = true end end
+			for j, row in ipairs(self.c_tabs.dlist) do for i, item in ipairs(row) do
+				if sel_all or last_kinds[item.data.kind] then
+					item.selected = true
+					found_tab = true
+					self.c_tabs.sel_i, self.c_tabs.sel_j = i, j
+					if sel_all and item.data.filter=="all" then _M._last_tabs_i = i end
+				end
+			end end
+		end
+		if not found_tab then
+			self.c_tabs.sel_i, self.c_tabs.sel_j = 1, 1
 			self.c_tabs.dlist[1][1].selected = true
 		end
+
 		self.uis[#self.uis+1] = {x=0, y=0, ui=self.c_tabs}
 		self.c_tabs.on_focus_change = function(ui_self, status)
 			if status == true then
@@ -241,14 +255,17 @@ function _M:updateTabFilterList(list)
 		return false
 	end
 
-	-- Save for next dialogs
+	-- Save for next dialog
 	if not self.dont_update_last_tabs then
 		_M._last_tabs = self.c_tabs:getAllSelectedKeys()
 		if not is_all then
 			local i = 1
-			for _, d in ipairs(_M._last_tabs) do i = math.max(i, d[2]) end
+			for _, d in ipairs(_M._last_tabs) do
+				i = math.max(i, d[2]) d.kind = self.c_tabs.dlist[d[1]][d[2]].data.kind
+			end
 			_M._last_tabs_i = i
 		else
+			_M._last_tabs.all = true
 			_M._last_tabs_i = #self.tabslist
 		end
 	end