Sample dataset loading

simply sync the sample dataset on app startup, but explicitly skip any activity feed entries related to the sample dataset.

Command for manually releasing migration locks

do a little bit of reorg on the init flow and specifically carve out an easy way for us to trigger an update of the sample dataset when that becomes necessary.

treat the "I'll add my data later" link as a normal branded link inst…

People Admin revamp + Password reseting

Prevent Liquibase migrations from leaving unreleased locks

inside a transaction.

fix data reference scroll issue

Task/Events reloading fix

simplify sample dataset management by adding a column `:is_sample` to the Database model.  also add a new api endpoint which allows us to easily recreate the sample dataset if the user wants to do so.

add some migration logic for Sample Dataset so that we don't accidentally add it twice and explicitly putt the creation of the sample dataset in our app installation code block.  we also create a new namespace for the sample dataset functions so that we can reuse them easily.

fixing issue where Exit Admin was showing up for non-admins.

update initialization for events namespaces to fix reloading issues and allow events to load in namespace.

Add a class to show scroll bars even in OS X which hides them