[MM-55135] Show header status width despite long header (#25138)

* use flex-shrink to retain header status width

* update header

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Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/sass/layout/_headers.scss

@@ -476,6 +476,7 @@
     .header-status__text {
         display: flex;
         overflow: hidden;
+        flex-shrink: 0;
         align-items: center;
         margin-right: 7px;
         line-height: 16px;