View Panel tooltip

[adityathebe]

Most of the descriptions that we're using can be a tooltip.

Example

spec:
  display:
    title: Pipelines
    icon: github
    sidebar: true
  cache:
    maxAge: 30m
    minAge: 1m
    refreshTimeout: 30s
  panels:
    - name: Repository
      type: table
      query: SELECT COUNT(*) AS value, details->'repository'->>'full_name' as repository FROM workflows GROUP BY details->'repository'->>'full_name'
    - name: Average Duration
      tooltip: Create Release average duration
      type: duration
      query: >
        SELECT AVG(details->'duration') AS value, details->'repository'->>'full_name' as label
        FROM workflows GROUP BY details->'repository'->>'full_name'