Fix inline actions showing on all selected tree items

[Copilot]

When multiple tree items are selected, inline actions were appearing on every selected item. The expected behavior (matching SCM view) is to show actions only on the focused or hovered item.

Changes

Removed .selected selector from action visibility CSS rules across 8 tree views:

Before:

.monaco-list-row:hover .actions,
.monaco-list-row.selected .actions,
.monaco-list-row.focused .actions {
    display: block;
}

After:

.monaco-list-row:hover .actions,
.monaco-list-row.focused .actions {
    display: block;
}

Affected views:

• Custom tree views
• Keybindings editor
• Ports/Tunnel view
• Comments panel
• Markers panel
• Workspace trust settings
• Chat sessions
• Terminal tabs

Actions now appear only on hover or focus, not on all selected items.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Multi-selected tree view items all render inline actions</issue_title>
<issue_description>As you can see in the image, all selected items render the "inline" actions

This differs in behavior to the SCM view, for example, which only renders the "inline" actions on the "focused/active" item and/or if hovered

/cc @alexr00 </issue_description>

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

• Fixes Multi-selected tree view items all render inline actions #208850

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