An empty style_formats should hide the option in the contextmenu

[mparpaillon]

📝 Provide detailed reproduction steps (if any)

Use style_formats with style_formats_autohide set to true. For instance

contextmenu: "styles",
style_formats_autohide: true,
style_formats: [
  {
    title: "Image Left",
    selector: "img",
    classes: ["floatLeft"],
  },
  {
    title: "Image Right",
    selector: "img",
    classes: ["floatRight"],
  },
  {
    title: "Bordered",
    selector: "img",
    classes: ["bordered"],
  },
],

✔️ Expected result

No context menu should open as no option are available for this target

❌ Actual result

With the configuration above, right clicking on anything (even not an image) will show the contextmenu with an empty broken "Formats" list (see screenshot below)

❓ Possible solution

We should hide the "Formats" option from the contextmenu if none is available for the current target

📃 Other details

• Browser: Version 123.0.6312.107
• OS: MacOS 14.3.1
• Affected version: 6.8.3