Advertise CM6 Rich Text in the CM5 track changes panel (#11361)

GitOrigin-RevId: 3d2e43263528c64292a01afb3d032e11a6cbbfb9

services/web/app/views/project/editor/review-panel.pug

@@ -249,9 +249,8 @@
 	.rp-unsupported-msg-wrapper
 		.rp-unsupported-msg
 			i.fa.fa-5x.fa-exclamation-triangle
-			p.rp-unsupported-msg-title Track Changes support in rich text mode is a work in progress.
-			p You can see tracked insertions and deletions, but you can't see comments and changes in this side bar yet.
-			p We're working hard to add them as soon as they're ready.
+			p.rp-unsupported-msg-title Join our #[a(href="/beta/participate") Beta program] to use Track Changes in Rich Text mode!
+			p You can #[a(href="/beta/participate") sign up] instantly to test and give feedback on our new version that includes comments and track changes!
 
 
 script(type='text/ng-template', id='changeEntryTemplate')

services/web/frontend/stylesheets/app/editor/review-panel.less

@@ -789,7 +789,7 @@
 
   .rp-unsupported-msg {
     display: flex;
-    width: @review-panel-width - 40px;
+    width: @review-panel-width - 70px;
     height: 100%;
     flex-direction: column;
     justify-content: center;