Repeating "Warning: Can not find activity value required for visualizations" (dozens)

[Erik Johansson]

A legitimate OMNI2 missing data warning message is repeated ~dozens of times, but not always. Happens at least when checking all GUI tree checkboxes, and at least for SWP. (Has not checked if it happens otherwise too.)

There is a missing data (OMNI2) period at ca 1994-12-28 00:00.00 that can be used for demonstrating the problem.

[Erik Johansson]

Resolved with better hack which allows MagProps#getActivity to detect whether the same "event" triggers subsequent calls.