side_by_side should preview files in a side view

[rchl]

Describe the bug
When using side_by_side: true option for commands that support it, if the command opens a quick panel with multiple items, the items open in the main view on changing selection and only on pressing Enter to select an item it opens in the side view. I suppose that it should also show previews in side view like native ST functionality does (for example shift+primary+f12).

To Reproduce
Steps to reproduce the behavior:

1. Set up keybinding like:

    {
        "command": "lsp_symbol_type_definition",
        "keys": ["f13"],
        "args": {"side_by_side": true},
        "context": [
            {
                "key": "lsp.session_with_capability",
                "operator": "equal",
                "operand": "typeDefinitionProvider"
            },
            {
                "key": "auto_complete_visible",
                "operator": "equal",
                "operand": false
            }
        ]
    },

3. Press F13 on some symbol that is referenced from multiple places

Expected behavior
Changing selection in quick panel should preview the file in a side by side view.

Environment (please complete the following information):

• OS: macOS
• Sublime Text version: 4134