Warn before opening too many urls

[skyper]

Similar to the warnings about opening too many history viewers or relation editors a warning about opening many urls at once might be useful.

What steps will reproduce the problem?

1. Have a bunch of route relations selected (in my case 30)
2. Unintentionally pressed Ctrl+Shift+H or Ctrl+Shift+I

What is the expected result?

A warning dialog asking if I really want to open 30 new tabs in my webbrowser

What happens instead?

No warning and my webbrowser tries to open as many of the 30 relations' history pages as possible.

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

At least history needs quite some resources which are already rare, atm.
Are there more actions than "Advanced Info (web)" and "History (web)" with same behavior? Tag2link already has this feature, so it only needs to be called in the other situations, as well.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-06-23 23:38:54 +0200 (Tue, 23 Jun 2020)
Revision:16713
Build-Date:2020-06-24 01:30:49
URL:https://josm.openstreetmap.de/svn/trunk