remove loading spinner && fix tab dom id

src/app/loading-spinner.js

-var yo = require('yo-yo')
-// -------------- styling ----------------------
-var csjs = require('csjs-inject')
-
-module.exports = loadingSpinner
-
-var css = csjs`
-  .loader {
-    display: inline-block;
-    margin-left: .3em;
-    border: 2px solid orange;
-    border-top: 2px solid #F4F6FF; /* Light blue */
-    border-radius: 50%;
-    width: 8px;
-    height: 8px;
-    animation: spin 2s linear infinite;
-  }
-  @keyframes spin {
-      0% { transform: rotate(0deg); }
-      100% { transform: rotate(360deg); }
-  }
-`
-function loadingSpinner () {
-  var el = yo`<div class=${css.loader}></div>`
-  return el
-}

src/app/tabbed-menu.js

 var $ = require('jquery')
-var loadingSpinner = require('./loading-spinner')
 
 module.exports = tabbedMenu
 
@@ -14,23 +13,7 @@ function tabbedMenu (container, appAPI, events, opts) {
   })
 
   // initialize tabbed menu
-  selectTab(container.querySelector('.envView'))
-
-  // add event listeners for loading spinner
-  events.compiler.register('loadingCompiler', function start () {
-    var settingsTab = document.querySelector('.settingsView')
-    if (settingsTab.children.length) return
-
-    var spinner = loadingSpinner()
-    settingsTab.appendChild(spinner)
-
-    appAPI.warnCompilerLoading('Solidity compiler is currently loading. Please wait a moment...')
-    events.compiler.register('compilerLoaded', finish)
-    function finish () {
-      events.compiler.unregister('compilerLoaded', finish)
-      settingsTab.removeChild(spinner)
-    }
-  })
+  selectTab(container.querySelector('.compileView'))
 
   // select tab
   function selectTab (el) {