"[application] is not responding" dialog is system-modal but not top-level

[Spraff]

To reporoduce:

* Ubuntu 18.04.1 LTS
* using gnome, run a GUI program in a debugger
* stop on a breakpoint when a dialog widget is open
* after a while, the "[application] is not responding ... Force Quit / Wait" dialog opens

When this happens, the "not responding" dialog is system modal and prevents mouse actions from being received by other applications.

However, these other applications are top-level, and the "not responding" dialog is hidden. It is not obvious what is happening and it is normal to want to use the mouse with other applications.

a) if the "not responding" dialog is stealing mouse events from the system, it should be top-level and force a user iteraction; or, if it can be hidden below other windows, it should not steal mouse events

b) there should be a "wait forever" option for debugging purposes

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1825519/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

Ubuntu 18.04 (bionic) reached end-of-standard-support on May 31, 2023.

I'm setting the status of this bug to 'Incomplete' as it's not seen any activity for some time. If this is still an issue when using a currently maintained release of Ubuntu then please let us know which one(s) otherwise this bug report can be left to expire in approximately 60 days time.

[Launchpad Janitor (janitor)]

[Expired for Ubuntu because there has been no activity for 60 days.]