Using Delay & Fire does wong time delay

[Kenneth Yrke Jørgensen]

This issue was originally discovered and reported by Sean Kristian Remond Harbo.

The delay & fire button does not update after doing an manuel delay, so it still tries to perform a delay (In attached model its blocked by invarians). You can confirm the extra delay is done by removing the invariant and see the double delay.
The delay & fire action is also used the the automatic simulation that there fore is also broken.

Issue is confirmed in 3.9 and 3.8.

Clicking the transition or double clicking in the transitions list works fine.