message: doc: Add tabColor to JSON schema
diff: "type": "boolean",
  "default": false
  },
  + "tabColor": {
  + "$ref": "#/definitions/Color",
  + "description": "Sets the color of the profile's tab. Using the tab color picker will override this color.",
  + "type": ["string", "null"]
  + },
  "tabTitle": {
  "description": "If set, will replace the name as the title to pass to the shell on startup. Some shells (like bash) may choose to ignore this initial value, while others (cmd, powershell) may use this value over the lifetime of the application.",
  "type": ["string", "null"]
  