message: Add enumDescriptions to enum setting items
diff: "tab",
  "external"
  ],
  - "description": "The default PDF viewer."
  + "description": "The default PDF viewer.",
  + "enumDescriptions": [
  + "Undetermined viewer. A viewer selector will pop up upon viewing PDF.",
  + "Open PDF with the default web browser.",
  + "Open PDF with the built-in tab viewer.",
  + "[Experimental] Open PDF with the external viewer set in \"View > Pdf > External: command\"."
  + ]
  },
  "latex-workshop.view.pdf.external.command": {
  "type": "object",
  "browser"
  ],
  "default": "inline",
  - "description": "Defines which type of hint to show when intellisense provides citation suggestions."
  + "description": "Defines which type of hint to show when intellisense provides citation suggestions.",
  + "enumDescriptions": [
  + "Use the inline intellisense to provide citation completion items.",
  + "Use a dropdown menu to provide citation completion items."
  + ]
  },
  "latex-workshop.intellisense.citation.label": {
  "type": "string",
  "authors"
  ],
  "default": "bibtex key",
  - "description": "Defines what to show as suggestion labels when intellisense provides citation suggestions."
  + "description": "Defines what to show as suggestion labels when intellisense provides citation suggestions.",
  + "enumDescriptions": [
  + "Show bibtex keys in the inline intellisense.",
  + "Show publication titles in the inline intellisense.",
  + "Show publication authors in the inline intellisense."
  + ]
  },
  "latex-workshop.intellisense.citation.maxfilesizeMB": {
  "type": "number",
  