Test HString:
 - Test parameters
 - Test changing language
 - Test changing string
 - Test removing string

 Exception happens when changing languages

 Update MenuBar, ContextMenu, ListBox and GUIDropDownBox so they handle HString properly
  - GUIDropDownData also accepts an array of localized strings
  - MenuBar/ContextMenu/ListBox need to properly fill that array and forward it
  - That array is then used for naming of menu entries (if it exists, otherwise we just use the name from the menu string)