distributor-ui - fix distributor UI and version

distributor-ui - fixed disappearing environments

Notes:
+ The 'mouseup' binding was causing the environment selector to disappear. This was added as part of BZ 859106 fix. I tested without this code and that BZ remains working without it.
+ The hardcode of distributor version to 3.2 is required for now. Future feature will (possibly?) allow setting it based upon what type of downstream tool the distributor is exporting a manifest for.
+ In general, the changes in this pull-request are to bring distributors inline w/ recent changes made to systems.