Make Comment the primary action in review dropdown

[Copilot]

The review actions dropdown (approve/comment/request changes) should always default to Comment as the primary action, appear first in both dropdown and expanded views, and only Comment should be blue when expanded to 3 buttons.

Changes

webviews/components/comment.tsx

• Set currentSelection to always be ReviewType.Comment instead of deriving from last review type or user state
• Reordered actions array: Comment → Approve → Request Changes
• Pass primaryOptionValue={ReviewType.Comment} to ContextDropdown
• Applied to both AddComment and AddCommentSimple components

webviews/components/contextDropdown.tsx

• Added optional primaryOptionValue prop to identify the primary action
• When expanded (width > 375px), apply secondary class to non-primary buttons
• Primary button retains default blue styling; others use secondary styling

Behavior

Before: Primary action varied by history; order was Approve, Comment, Request Changes; all buttons styled identically when expanded

After: Primary action is always Comment; order is Comment, Approve, Request Changes; only Comment is blue when expanded

Original prompt

For the approve, comment, request changew dropdown button: make comment the primary action, make only the primary action blue when the dropdown has enough space to be 3 buttons, and make the primary action first, both when dropped down and when expanded.

User has selected text in file webviews/components/merge.tsx from 324:6 to 334:85

Created from VS Code via the GitHub Pull Request extension.

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