Added new market buttons: Close, Refresh Offers, and Reset Market.

* New refresh offers function.
* Fixed Market.reset function.

modules/corelib/ui/uibutton.lua

@@ -5,4 +5,4 @@ function UIButton.create()
   local button = UIButton.internalCreate()
   button:setFocusable(false)
   return button
-end
+end

modules/corelib/ui/uitable.lua

@@ -92,6 +92,8 @@ function UITable:addHeaderRow(data)
         col:setHeight(value)
       elseif type == 'text' then
         col:setText(value)
+      elseif type == 'onClick' then
+        col.onClick = value
       end
     end
     table.insert(columns, col)