Fix missing top padding in commit options menu

[Copilot]

The commit options menu in the Home view's active branch card had no padding at the top, causing the first menu item to sit flush against the menu edge while the bottom had proper spacing.

Changes

• src/webviews/apps/shared/components/overlays/popover.ts: Normalized padding for menu-appearance popovers

 :host([appearance='menu']) {
-  --sl-tooltip-padding: 0 var(--sl-spacing-2x-small) var(--sl-spacing-2x-small);
+  --sl-tooltip-padding: var(--sl-spacing-2x-small);
   --sl-tooltip-font-size: var(--vscode-font-size);
   --sl-tooltip-background-color: var(--vscode-menu-background);
   --arrow-color: var(--vscode-menu-background);
 }

Applies consistent 0.4rem padding on all sides instead of asymmetric top (0) / sides (0.4rem) / bottom (0.4rem).

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Fix padding in commit options menu</issue_title>
<issue_description>In the active commit card on Home, the top item in the commit options menu is missing some padding at the top.

</issue_description>

<agent_instructions>At the top of the Home View in GitLens, there is an active branch card that shows details about the currently checked-out branch. That card has a menu that shows options for what you can do with the working changes on that branch, like generating a commit message, explaining changes, etc. The top menu item in that list is missing some padding on the top to separate the top item from the top of the menu. The fix should use the same amount of space on the bottom of the menu that separates the bottom menu item from the bottom of the menu.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Fix padding in commit options menu #4840

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