Fix 1px gap at bottom of screen.
Turn results labels black when on the 'Messages' tab.
Default to the 'Messages' tab at startup.
Support multiple root-level plans returned from EXPLAIN.

(needed for e.g. `DELETE` queries on tables with `ON DELETE` rules)
Put EXPLAIN on a separate line from the rest of the query.
Attempting to correct cursor positioning on error for EXPLAIN line length and selection start.
Added application_name to connection info.
Mask 'password' when displaying connection info.
Also scroll to the bottom of the Messages tab if it's not currently visible.
Added an 'add connection' form, and changed to load connection info from cookies.
Partial implementation of geometry support.