- client: Don't hide version string when built-in auto-update is disabled: Merge pull request #628 in DNS/adguard-home from fix/1726 to master

Close #1726

Squashed commit of the following:

commit 3eac793c7c05fbb599f510fd8cae560011b7f5ca
Merge: aebfaf61 16a6aada
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed May 27 14:14:58 2020 +0300

    Merge branch 'master' into fix/1726

commit aebfaf610113f83027feb959ed87adef1b2db255
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed May 27 12:54:30 2020 +0300

    Always show version but hide update button when program is launched with "--no-check-update" flag

commit 1d4ee05959379420fee9730b3bf8ba737852e96e
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed May 27 11:59:10 2020 +0300

    Use classnames lib

commit 7003a7064c9625fab513dc02222faff4a340393f
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue May 26 19:40:22 2020 +0300

    - client: Don't hide version string when built-in auto-update is disabled

client/src/components/ui/Version.js

@@ -6,14 +6,15 @@ import './Version.css';
 
 const Version = (props) => {
     const {
-        dnsVersion, processingVersion, t,
+        dnsVersion = 'undefined', processingVersion, t, checkUpdateFlag,
     } = props;
 
     return (
         <div className="version">
             <div className="version__text">
-                <Trans>version</Trans>:&nbsp;<span className="version__value" title={dnsVersion}>{dnsVersion}</span>
-                <button
+                <Trans>version</Trans>:&nbsp;
+                <span className="version__value" title={dnsVersion}>{dnsVersion}</span>
+                {checkUpdateFlag && <button
                     type="button"
                     className="btn btn-icon btn-icon-sm btn-outline-primary btn-sm ml-2"
                     onClick={() => props.getVersion(true)}
@@ -23,7 +24,7 @@ const Version = (props) => {
                     <svg className="icons">
                         <use xlinkHref="#refresh" />
                     </svg>
-                </button>
+                </button>}
             </div>
         </div>
     );
@@ -33,6 +34,7 @@ Version.propTypes = {
     dnsVersion: PropTypes.string.isRequired,
     getVersion: PropTypes.func.isRequired,
     processingVersion: PropTypes.bool.isRequired,
+    checkUpdateFlag: PropTypes.bool.isRequired,
     t: PropTypes.func.isRequired,
 };