Hide "cut" menu when text is not editable

#1144

Author: adlk

src/webview/contextMenu.js

@@ -35,7 +35,7 @@ const buildMenuTpl = (props, suggestions) => {
       id: 'cut',
       role: can('Cut') ? 'cut' : '',
       enabled: can('Cut'),
-      visible: !!props.selectionText.trim(),
+      visible: !!props.selectionText.trim() && props.isEditable,
     }, {
       id: 'copy',
       label: 'Copy',