fix: smaller fixes for subscriber table

[venarius]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  • This fixes unneeded styles and cursor: pointer on subscribers table hover when there is no click action.
  • Removes the tooltips because they only show the same information again
  • Also hide the pagination of the table when there is only one page.
  • Also fixes a warning from react for missing key in HeaderNav list rendering.

[jainpawan21]

Thanks a lot @venarius ❤️