wp.domReady fires later than jQuery's
document.ready, so this, combined with moving most FM scripts to the footer, resolves race conditions that prevent initialization of dynamic fields across the board in Fieldmanager.
Additionally, uses FM_VERSION to set version numbers for Fieldmanager JS and CSS to ensure cache busting when shipping a new version of Fieldmanager to aggressively cached sites, such as VIP Go. Accordingly, bumps the version to 1.2.6.
Finally, moves script load for most FM scripts to the footer, which is required for proper initialization of fields in a Gutenberg context, and is generally a best practice.