Make `editor.gotoLocation.multiple: "goto"` state UX more discoverable

**Steps to Reproduce:** 1. Set `"editor.gotoLocation.multiple": "goto"` 2. `f12` on `IFileService` in https://github.com/microsoft/vscode/blob/87d3f3e77b5c7108babf8e86f70eedac5820bba2/src/vs/platform/files/common/files.ts#L20 **Request** We currently show the navigation state in the status bar:  This is not very discoverable the first time you use this feature. It can also be hidden if you have terrible status bar cramping:  <!-- Launch with `code --disable-extensions` to check. --> Does this issue occur when all extensions are disabled?: Yes