Allow jotblocks to be moved using directional keys

We often run into issues with getting jotblocks to line up with the spaces made for them on documents, so it ends up looking unprofessional with the populated information being off-centered and not having a uniform appearance.

By allowing jotblocks to be moved on the page using directional keys, users can ensure more precise placement of the populated data on documents--which builds better trust with the recipients of the documents.