Add panel:get_info()

DOCS.md

@@ -39,6 +39,9 @@ Install it as any other mod `¯\_(ツ)_/¯`
 ## 2.1. Functions
 
 * `new({params})`: creates a new panel
+* `get_info()`: returns a table containing the following fields:
+  * `bg`: (table) a copy of the HUD of the background (with MT values such as `hud_elem_type`, `position`, `scale` etc.)
+  * `title`: (table) same as `bg` but for the title HUD
 * `show()`: makes the panel appear
 * `hide()`: makes the panel disappear (but it's still assigned to the player)
 * `is_visible()`: whether the panel is currently displayed

api.lua

@@ -305,6 +305,16 @@ end
 
 
 
+function Panel:get_info()
+  local info = {}
+  info.bg       = table.copy(self.background_def)
+  info.title    = table.copy(self.title_def)
+
+  return info
+end
+
+
+
 function Panel:is_visible()
   return self.visible
 end