fixes for diabled state, tri-state boolean and access control

src/components/settings_modal/helpers/boolean_setting.js

@@ -3,13 +3,28 @@ import Setting from './setting.js'
 
 export default {
   ...Setting,
+  props: {
+    ...Setting.props,
+    indeterminateState: [String, Object]
+  },
   components: {
     ...Setting.components,
     Checkbox
   },
+  computed: {
+    ...Setting.computed,
+    isIndeterminate () {
+      return this.visibleState === this.indeterminateState
+    }
+  },
   methods: {
     ...Setting.methods,
     getValue (e) {
+      // Basic tri-state toggle implementation
+      if (!!this.indeterminateState && !e && this.visibleState === true) {
+        // If we have indeterminate state, switching from true to false first goes through indeterminate
+        return this.indeterminateState
+      }
       return e
     }
   }