AppManager: Fix instance menu scrollbar occurrence during installation

Change-Id: I1c34fd202694d02fb57c438202624b3415bc52eb
diff --git a/core/installer/welcome/appmanager-tmpl/base.html b/core/installer/welcome/appmanager-tmpl/base.html
index 1cd8c3c..f1a26b2 100644
--- a/core/installer/welcome/appmanager-tmpl/base.html
+++ b/core/installer/welcome/appmanager-tmpl/base.html
@@ -26,6 +26,6 @@
 			  {{ block "content" . }}{{ end }}
 		  </div>
       </main>
-    <script src="/static/app-manager.js?v=0.0.1"></script>
+    <script src="/static/app-manager.js?v=0.0.2"></script>
 	</body>
 </html>
diff --git a/core/installer/welcome/static/app-manager.js b/core/installer/welcome/static/app-manager.js
index ff10c1b..5cd568b 100644
--- a/core/installer/welcome/static/app-manager.js
+++ b/core/installer/welcome/static/app-manager.js
@@ -4,6 +4,9 @@
     const nav = document.getElementById("menu");
     const windowHeight = window.innerHeight - headerHeight;
     nav.style.setProperty("--max-height", `${windowHeight}px`);
+    const menu = document.getElementById("menu-nav");
+    const menuHeight = parseFloat(getComputedStyle(document.getElementById('menu-nav')).height.replace("px", "")) + 15;
+    menu.style.setProperty("height", `${menuHeight}px`);
 });
 
 let prevWindowHeight = window.innerHeight;