add API for returning a setting key

src/app/tabs/settings-tab.js

@@ -10,7 +10,7 @@ import * as packageJson from '../../../package.json'
 const profile = {
   name: 'settings',
   displayName: 'Settings',
-  methods: [],
+  methods: ['getConfigByKey'],
   events: [],
   icon: 'data:image/svg+xml;base64,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',
   description: 'Remix-IDE settings',
@@ -162,4 +162,8 @@ module.exports = class SettingsTab extends ViewPlugin {
     this._deps.themeModule.switchTheme()
     return this._view.el
   }
+  
+  configByKey (key) {
+    return new Promise((resolve, reject) => resolve(this.config.get(`settings/${key}`)))
+  }
 }