UI fixes:
- Change the "update available" icon.
- Move Project Package Manager to action first work flow.
- Show preview window when user clicks the action button.
- Merge Solution Package Manager & Project Package Manager into one class.
- Improving perf on V3 feed by cutting down network calls.
- Keep the user options in the detail control.
- Fix icons for search & update available.
- Add AutomationId
- Make texts "package source:" & "filter" bold.
- Some wording change.
- Fix layout of dependency set display in UI.