Slight rearrangement of the gr-change-view header

Screenshots: https://imgur.com/a/VO4grcr

- Remove the separator
- Make the colon invisible
- Move star to the right of the status

Change-Id: I6e7de5947291ac1367e860c7159a84516d1b2157
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html
index b86213a..2656626 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html
@@ -92,6 +92,9 @@
         flex: 1;
         font-size: var(--font-size-h3);
       }
+      .changeNumberColon {
+        color: transparent;
+      }
       .headerTitle .headerSubject {
         font-weight: var(--font-weight-bold);
       }
@@ -100,6 +103,7 @@
       }
       gr-change-star {
         margin-right: var(--spacing-xs);
+        margin-left: var(--spacing-l);
       }
       gr-reply-dialog {
         width: 60em;
@@ -367,11 +371,6 @@
         hidden$="{{_loading}}">
       <div class$="[[_computeHeaderClass(_editMode)]]">
         <div class="headerTitle">
-          <gr-change-star
-              id="changeStar"
-              change="{{_change}}"
-              on-toggle-star="_handleToggleStar"
-              hidden$="[[!_loggedIn]]"></gr-change-star>
           <div class="changeStatuses">
             <template is="dom-repeat" items="[[_changeStatuses]]" as="status">
               <gr-change-status
@@ -390,10 +389,14 @@
                   server-config="[[_serverConfig]]"></gr-commit-info>
             </template>
           </div>
-          <span class="separator"></span>
+          <gr-change-star
+              id="changeStar"
+              change="{{_change}}"
+              on-toggle-star="_handleToggleStar"
+              hidden$="[[!_loggedIn]]"></gr-change-star>
           <a aria-label$="[[_computeChangePermalinkAriaLabel(_change._number)]]"
               href$="[[_computeChangeUrl(_change)]]">[[_change._number]]</a>
-          <pre>: </pre>
+          <span class="changeNumberColon">:&nbsp;</span>
           <span class="headerSubject">[[_change.subject]]</span>
         </div><!-- end headerTitle -->
         <div class="commitActions" hidden$="[[!_loggedIn]]">