[IMP] cetmix_tower_server: added server status field

[dmitriypaulov]

• Status field for cx.tower.server model
• Custom js widget for displaying server status
• Filters and groups for search view:
  • Running
  • Not running
  • Status (group)

[ivs-cetmix]

/ocabot merge nobump

[CetmixGitDrone]

On my way to merge this fine PR! Prepared branch 14.0-dev-ocabot-merge-pr-70-by-ivs-cetmix-bump-nobump, awaiting test results.

[CetmixGitDrone]

Congratulations, your PR was merged at 6ca3a58f1eb9d6030d9d72cf1c1d7e48edd1c6eb. Thanks a lot for contributing to cetmix. ❤️