message: use ctrl+alt+c for clean command
diff: "key": "ctrl+alt+b",
  "when": "!isMac && editorTextFocus"
  },
  + {
  + "command": "latex-workshop.clean",
  + "key": "cmd+alt+c",
  + "when": "isMac && editorTextFocus"
  + },
  + {
  + "command": "latex-workshop.clean",
  + "key": "ctrl+alt+c",
  + "when": "!isMac && editorTextFocus"
  + },
  {
  "command": "latex-workshop.view",
  "key": "cmd+alt+v",
  