remove header options when maintenance-mode is on (#1189)

client/src/app/main/main-layout-header.js

@@ -13,12 +13,24 @@ class MainLayoutHeader extends React.Component {
     render() {
         return (
             <div className="main-layout-header">
-                {this.renderAccessLinks()}
-                <LanguageSelector {...this.getLanguageSelectorProps()} />
+                {this.renderHeaderOptions()}
             </div>
         );
     }
-    
+
+    renderHeaderOptions(){
+        let result = null;
+        
+        if(!this.props.config['maintenance-mode']){
+            result = (<div>
+                {this.renderAccessLinks()}
+                <LanguageSelector {...this.getLanguageSelectorProps()} />
+            </div>)
+        }
+
+        return result;
+    }
+
     renderAccessLinks() {
         const {
             session,

client/src/app/main/main-layout-header.scss

@@ -8,7 +8,7 @@
     display: flex;
     flex-direction: row;
     justify-content: space-between;
-
+    min-height: 40px;
     &__user-name {
         color: $primary-red;
     }