glide.ui.html.editor.contextmenu

ServiceNow property description:

Client-side HTML editor has its own context menu, overriding the browser's. Holding Ctrl while right-clicking bypasses the editor's context menu to show the native context menu. This property specifies which context menu options are available. Default value is "link image table" (without quotes). A value of "false" (without quotes) disables the editor's context menu.