Replicant handler doesn't show up automatically in the replicable window

[miqlas]

This is with Haiku shredder 1 hrev53732 Jan 19 2020 08:40:01 x86_64 x86_64 Haiku

To reproduce:

1) Disable replicant handlers in the Haiku menu (Show replicants should have no checkmark)
2) Open a program which can be used as replicant (like NetworkStatus)
3) Enable Replicant handles in the Haiku menu (Show replicants should have  checkmark)
4) In the NetworkStatus window the repicant handler still invisible
..) Closing and reopening NetworkStatus makes the handler visible

I think the handler should be visible without restarting the program.

[X512]

Proposed fix: ​https://review.haiku-os.org/c/haiku/+/2128.

[X512]

Fixed in hrev53737.

[nielx]

Assign tickets with status=closed and resolution=fixed within the R1/beta2 development window to the R1/beta2 Milestone