Use core functions for recognizing objects ids and types plus automatically include buffer content

[skyper]

What steps will reproduce the problem?

1. Have a layer with reverted data including mean-while deleted objects
2. Select some of these deleted object
3. "Copy" or "Copy server URL"
4. Open undelete objects dialog
5. (Past from buffer)

What is the expected result?

Content from buffer should automatically pasted in the dialog without user interaction

What happens instead?

Even after pasting, I have to manually adjust the string to be recognized

Please provide any additional information below. Attach a screenshot if possible.

There is some code in core for "Download objects" which could probably be used here.
See also #14982 and #21999.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2022-04-04 22:26:00 +0200 (Mon, 04 Apr 2022)
Revision:18427
Build-Date:2022-04-05 01:30:55
URL:https://josm.openstreetmap.de/svn/trunk

Plugins:
+ reverter (35893)
+ undelete (35893)
+ utilsplugin2 (35951)