Fixes and improvements

Minor fixes and improvements.

Improvements

• Styling improvements to the Dispatcher (⌘N dialog)
• UI improvements for cloud setup
• Added an "Add your first project" button in the sidebar during onboarding. It opens the add-repository menu and disappears after the user adds a project.
• Repo-scoped settings now take effect as soon as they're loaded into your workspace. (They don't need to be in the repository root/main worktree.)

Fixes

• Fixed an issue where run script tabs appeared in workspaces that had not run that script.
• Fixed an issue where error details in expanded recoverable errors, banners, and inline error notices could not be selected for copying.
• Fixed an issue where error notifications could appear behind a dialog's dimmed background, making clone and setup error toasts visible over the Quick start and Clone GitHub repo dialogs.
• Fixed a delay before code comments appeared in the composer for cloud workspaces.
• Fixed an issue where archiving a workspace could ignore its delete_branch_on_archive setting.

Misc

• Renamed the onboarding sample project from "Quickstart" to "Starter project" in the sidebar and local clone folder name. The cloned remote is unchanged.