Copy all/Paste/Undo/Redoqq popup menu on OryUITextfield

[KevinCrossDCL]

Add a pop up menu to OryUITextfield that appears when the textfield is pressed while active i.e. first press to activate textfield, second press to show the popup menu.

The menu should have at least paste. Include this option even if clipboard is empty because GetClipboardText() gets the text in clipboard before the user has given permission. Only call it when the paste button has been pressed.

As you can't select some of the text in a textfield Include an option for copy all, instead of the usual copy.

Undo/Redo would work if the textfield widget remembers the current text each time the focus status changes.