Geo Primary verification: Hide checksum buttons and status when the model is not verifiable

Problem to solve

When a model's replication is disabled, so is verification. Currently, in the new Data Management area, we're showing the checksum button and verification_state badge for all model records, even if they're un-verifiable.

Proposal

Hide the state badge and checksum buttons when the model is not verifiable. This data is found in model_data, in the checksum_enabled field.

In other words: if model_data[:checksum_enabled] is false, hide the badge and checksum buttons.