add "view release changes" button below the update available banner

src/app/components/Header.jsx

@@ -505,6 +505,9 @@ export default class Header extends TranslatedComponent {
     return (
       <header>
         {this.props.appCacheUpdate && <div id="app-update" onClick={() => window.location.reload() }>{translate('PHRASE_UPDATE_RDY')}</div>}
+        {this.props.appCache ? <a className={"view-changes"} href={"https://github.com/EDCD/coriolis/compare/edcd:develop@{" + window.CORIOLIS_DATE + "}...edcd:develop"} target="_blank">
+          {"View Release Changes"}
+        </a> : null}
         <Link className='l' href='/' style={{ marginRight: '1em' }} title='Home'><CoriolisLogo className='icon xl' /></Link>
 
         <div className='l menu'>

src/less/header.less

@@ -12,6 +12,20 @@
   cursor: pointer;
 }
 
+.view-changes {
+  position: fixed;
+  top: 3em;
+  left: 0;
+  right: 0;
+  height: 3em;
+  z-index: 3;
+  line-height: 3em;
+  text-align: center;
+  background-color: @bg;
+  color: @warning;
+  cursor: pointer;
+}
+
 header {
   background-color: @bg;
   margin: 0;