Fix codicon shifting in hover widgets during async content loading

[Copilot]

This PR fixes an issue where codicons would shift position in hover widgets when content loads asynchronously, particularly noticeable in git blame editor decoration hovers.

Problem

When hovering over git blame decorations, codicons (like $(history), $(git-commit), $(copy), $(gear)) would initially appear in one position, then shift when the hover content finished loading asynchronously. This happened because:

1. The hover initially renders with partial content
2. Async operations load additional data (avatars, commit information, remote commands)
3. When the full content renders, layout reflow causes codicons to shift position

Solution

Added CSS properties to ensure stable codicon positioning during content loading:

• display: inline-block - Maintains consistent box model behavior during layout changes
• line-height: 1 - Provides stable vertical spacing regardless of surrounding content

The fix is applied to two selectors to ensure comprehensive coverage:

1. .monaco-hover .markdown-hover .hover-contents .codicon - General codicons in markdown hovers
2. .monaco-hover .markdown-hover .hover-contents:not(.code-hover-contents):not(.html-hover-contents) span.codicon - Specific span codicons (already had margin fixes)

Testing

• Verified the CSS patterns align with existing VS Code codebase conventions
• Confirmed no conflicts with other hover-related styles (verbosity actions use different selectors)
• Validated that the fix targets the exact codicons used in git blame hovers

The changes are minimal (6 lines added, 0 deleted) and focused specifically on preventing layout shifts without affecting existing functionality.

Fixes #238356.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• electronjs.org
  • Triggering command: node-gyp (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.