[*] remove redundant Source Name from Tables Overview dashboard, fixes #1134 (#1160)

* Remove redundant Source Name field from single-db dashboards

* Remove redundant dbname field

* make panels left aligned, add inspect option

* Adjust column sizes

* fix `ORDER BY`

* Fix panel query

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Co-authored-by: 0xgouda <gouda0x@gmail.com>

Author: Mohamed-Elfardy