UI: Remove sidebar fluctuation on switching the toggle button

Fixes #301

app/renderer/css/main.css

@@ -18,7 +18,7 @@ body {
     background-position: center;
 }
 
-#sidebar {
+.toggle-sidebar {
     background: #222c31;
     width: 54px;
     padding: 27px 0 20px 0;
@@ -27,6 +27,22 @@ body {
     flex-direction: column;
     -webkit-app-region: drag;
     overflow: hidden;
+    transition: all 0.5s ease;
+}
+
+.toggle-sidebar div {
+    transform: translateX(0);
+    transition: all 0.5s ease-out;
+}
+
+.sidebar-hide {
+    width: 0;
+    transition: all 0.8s ease;
+}
+
+.sidebar-hide div {
+    transform: translateX(-100%);
+    transition: all 0.6s ease-out;
 }
 
 @font-face {
@@ -285,7 +301,9 @@ webview:focus {
     display: none !important;
 }
 
+
 /* Full screen Popup container  */
+
 .popup .popuptext {
     visibility: hidden;
     background-color: #555;

app/renderer/js/main.js

@@ -260,9 +260,9 @@ class ServerManagerView {
 
 	toggleSidebar(show) {
 		if (show) {
-			this.$sidebar.classList.remove('hidden');
+			this.$sidebar.classList.remove('sidebar-hide');
 		} else {
-			this.$sidebar.classList.add('hidden');
+			this.$sidebar.classList.add('sidebar-hide');
 		}
 	}
 

app/renderer/main.html

@@ -13,7 +13,7 @@
     <div class="popup">
       <span class="popuptext hidden" id="fullscreen-popup"></span>
   </div>
-  <div id="sidebar">
+  <div id="sidebar" class="toggle-sidebar">
     <div id="view-controls-container">
       <div id="tabs-container"></div>
       <div id="add-tab" class="tab functional-tab">