dashboard: deep state update, version in footer (#15837)

* dashboard: footer, deep state update

* dashboard: resolve asset path

* dashboard: remove bundle.js

* dashboard: prevent state update on every reconnection

* dashboard: fix linter issue

* dashboard, cmd: minor UI fix, include commit hash

* remove geth binary

* dashboard: gitCommit renamed to commit

* dashboard: move the geth version to the right, make commit optional

* dashboard: commit limited to 7 characters

* dashboard: limit commit length on client side

* dashboard: run go generate