fix login button

invenio_theme_tuw/assets/semantic-ui/less/invenio_theme_tuw/theme.less

@@ -122,13 +122,13 @@ abbr[title] {
 
 #sidebar {
     background-color: #373737;
-    z-index: 1;
     width: 330px;
     min-height: 100%;
     height: 100%;
     position: absolute;
     transform: translateX(-330px);
     transition: .2s ease-in-out;
+    z-index: 1;
 }
 
 #sidebar.open {
@@ -286,12 +286,13 @@ header.pushedright {
 }
 
 .login-btn {
-    width: 100%;
-    height: 50px;
+    width: 190px;
+    height: 100%;
     background-color: #006699;
     display: flex;
     justify-content: center;
     align-items: center;
+    display: none;
 }
 
 .login-btn span {
@@ -304,12 +305,15 @@ header.pushedright {
     color: white;
 }
 
-.login-btn.desktop {
-    width: 190px;
-    height: 100%;
-    display: none;
+#sidebar .login-btn {
+    height: 50px;
+    width:100%;
+    display: flex !important;
 }
 
+#sidebar .login-btn {
+    display: none;
+}
 #right-header {
     display: flex;
 }
@@ -350,9 +354,10 @@ nav.primary a:hover {
     #nav-icon {
         display: none;
     }
-    .login-btn.desktop {
+    .login-btn {
         display: flex;
     }
+
     nav.primary {
         display: flex;
     }