* move utils into database module
* draw help in connections view
* support postgres
* add table_schema field
* implement Pool for Postgres
* fix database tree for postgres
* add tests for selection_top, bottom
* fix clippy warnings
* remove unused function
* get schema
* fix clippy warnings
* show user defined types
* fix cell with when selecting far right cell
* split tests into tree functions
* convert TEXT[] to Vec<String>
* add prefix
* remove column pattern matching
* implement key config
* use key config in help component
* use key config in databases component
* use key config in error component
* use key config in connections component
* set commands
* use database/table as a table component name
* fix a test for get_text
* use key config in tab component
* fix function name
* add focus_connections key
* use quit exit key
Takayuki Maeda