qt5.qtwebengine: Sessions restore patch

[doronbehar]

Per #99456 (comment)

cc @ttuegel .

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[doronbehar]

Targeting PR to master.

[The-Compiler]

Note this isn't a security patch - it patches crashes happening with Qt 5.15.1 which make it almost unusable otherwise, but they are not security related.

What I meant in #99456 (comment) is that it's a bad idea for the qutebrowser package to depend on Qt 5.14 instead of 5.15.

[doronbehar]

it patches crashes happening with Qt 5.15.1

Now I notice our qt5.15 is qt5.15.0 but the patch applies to it as well. It's still good to apply it right?

[doronbehar]

Fixed the commit message.

[The-Compiler]

Now I notice our qt5.15 is qt5.15.0 but the patch applies to it as well. It's still good to apply it right?

Surely doesn't hurt. I don't know which change between Qt 5.15.0 and .1 triggered the issue.

[doronbehar]

Closed in favor of #102216 .