Bridge Save and Condition Builder Fixes

Fixes for bridge configuration saving and condition builder defaults that were introduced alongside the CSV Address Tables release.

Fixes

• Fixed bridge save discarding deleted addresses and custom meta fields -- removing an address row or a custom metadata column in the address table now persists correctly on save
• Fixed the second conditional clause defaulting to "equals" when its value was empty -- new clauses now start without a pre-selected operator, matching the first clause behavior
• "Unit" has been removed from the default CSV table columns. A warning indicating column duplicates was added