Schema, theme, and editor fixes

Schema, theme, and editor fixes.

Fixes

• Map fields in the bridge editor JSON schema incorrectly produced "type": "string" instead of "type": "object" with additionalProperties. Component reference types (input, output, processor, scanner) and unknown types had the same issue -- all now map to the correct schema types
• Previously, if two bridges shared the same internal ID, the bridge selection list would fail to render. Duplicate entries are now filtered out automatically
• Make the background of the user management input fields respond to the selected theme

• Fixed the data model code editor being capped at a small fixed height, leaving most of the screen empty -- it now expands to fill the available window height, consistent with other editor instances