Add reject button to unification page

Redirecting to hierarchy window with selected unified frame
Next iteraztion of hierarchy tree component

Increase shm size for postrgress

Frame list refresh event.

Return list of unifird frames without slowal frames assigments.

Replace slowal frame argument position.
Slowal frame status change implementation.

Revert __init__.py files

Moving selectional preference popup code from Slowal project. Making some adjustments to database models and  API.