Revert PM UI refresh regression for SDK-style install/uninstall flows

[Copilot]

PM UI stopped auto-refreshing after package install/uninstall in SDK-style projects starting in 7.6.0.54, while update operations and non-SDK project flows remained unaffected. This change restores the pre-regression refresh behavior so tab state stays in sync after package actions.

• What changed

  • Reverted commit 76b3a60499f1e0ffdd6d406f2f07bc04758d94cf in the PM UI refresh path.
  • Restored action-complete refresh signaling used by SDK-style project install/uninstall operations.
  • Removed the regressed behavior that prevented post-action list/detail refresh in Browse/Installed/Updates transitions.

• Why this addresses the issue

  • The reported repro sequence depends on post-install and post-uninstall refresh events.
  • Reverting the regressed commit restores the prior event/refresh flow that correctly updates PM UI after those operations.

git revert 76b3a60499f1e0ffdd6d406f2f07bc04758d94cf