Add update check

Closes #338

client/src/components/Header/Header.css

@@ -67,11 +67,15 @@
 }
 
 .nav-version {
-    padding: 16px 0;
-    font-size: 0.85rem;
+    padding: 7px 0;
+    font-size: 0.80rem;
     text-align: right;
 }
 
+.nav-version__value {
+    font-weight: 600;
+}
+
 .header-brand-img {
     height: 26px;
 }
@@ -103,7 +107,7 @@
 
     .nav-version {
         padding: 0;
-        font-size: 0.9rem;
+        font-size: 0.85rem;
     }
 }
 

client/src/components/Header/Version.js

@@ -5,7 +5,12 @@ export default function Version(props) {
     const { dnsVersion, dnsAddress, dnsPort } = props;
     return (
         <div className="nav-version">
-            version {dnsVersion} / address: {dnsAddress}:{dnsPort}
+            <div className="nav-version__text">
+                version: <span className="nav-version__value">{dnsVersion}</span>
+            </div>
+            <div className="nav-version__text">
+                address: <span className="nav-version__value">{dnsAddress}:{dnsPort}</span>
+            </div>
         </div>
     );
 }