[BUG] Trigger threshold reset after editing Monitor

[qreshi]

When a Monitor is created using the visual graph and a Trigger has been created with it, if the Monitor is edited (even if no actual values are changed) then going to the Trigger edit page shows the threshold value as the default 10,000. This seems to be a visual bug as the underlying config value has not been changed unless the Trigger update is submitted with the 10,000 value on accident.

This was seen on ES 7.9. The root cause has not been determined and it is currently uncertain if this is an introduced regression or if this behavior has always been present.

[kid4git]

Duplicate of #199

[qreshi]

Closing in favor of #199