Prevent text from overflowing in change_plugins entry point

Otherwise this can happen: http://i.imgur.com/oLiVU6a.png

Bug: Issue 4878
Change-Id: I8d5e465be378aa37250d03656a45905d1f3104ae
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 ecd26ad..4528db1 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 +92,10 @@
       .changeMetadata {
         font-size: .95em;
       }
+      /* Prevent plugin text from overflowing. */
+      #change_plugins {
+        word-break: break-all;
+      }
       .commitMessage {
         font-family: var(--monospace-font-family);
         flex: 0 0 72ch;