New counters for Issue and Merge request lists

Issue #169

• Projects
  • Memory | Web version has no such info in projects list. Not implemented
  • Commits
  • Fork
  • Stars

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• Merge request
  • Milestone
  • Assigned to | This is not relate to counters IMHO. Needs layout redesign. Not implemented
  • Tasks
  • Locked
  • Pipelines | Need additionals api call to Pipelines api, not suitable for list of projects. Not implemented
  • Approvals | Need additionals api call to MR api, not suitable for list of projects. Not implemented

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• Issues
  • Milestone
  • Assigned to | This is not relate to counters IMHO. Needs layout redesign. Not implemented
  • Confidential
  • Locked
  • Weight
  • Due date
  • Tasks