Change default tab to contract

assets/css/browser-solidity.css

@@ -42,6 +42,20 @@ body {
     left: 0;
 }
 
+.loader {
+    border: 16px solid #f3f3f3; /* Light grey */
+    border-top: 16px solid #3498db; /* Blue */
+    border-radius: 50%;
+    width: 120px;
+    height: 120px;
+    animation: spin 2s linear infinite;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
 #tabs-bar {
     position: absolute;
     overflow: hidden;

index.html

@@ -57,11 +57,11 @@
 				<div id="menu">
 					<img id="solIcon" title="Solidity realtime compiler and runtime" src="assets/img/remix_logo_512x512.svg" alt="Solidity realtime compiler and runtime">
 					<ul id="options">
-						<li class="envView" title="Environment">Contract</li>
+						<li class="envView active" title="Environment">Contract</li>
 						<li class="publishView" title="Publish" >Files</li>
 						<li class="debugView" title="Debugger">Debugger</li>
 						<li class="staticanalysisView" title="Static Analysis">Analysis</li>
-						<li class="settingsView active" title="Settings">Settings</li>
+						<li class="settingsView" title="Settings">Settings</li>
 						<li id="helpButton"><a href="https://solidity.readthedocs.org" target="_blank" title="Open Documentation">Docs</a></li>
 					</ul>
 				</div>