Fix overflow of the title links on a small window

Release-Notes: skip
Bug: Google b/457064200
Change-Id: Ic84535c73d6cd962704f0ae56a0df1cf785ecb94

polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts

diff --git a/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts b/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts
index 6bc44b0..760691b 100644
--- a/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts
+++ b/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts
@@ -246,6 +246,11 @@
           list-style: none;
           padding-left: var(--spacing-l);
         }
+        /* Prevents the links from overflowing onto the next line when width is reduced. */
+        .links {
+          whitespace: no-wrap;
+          overflow: auto;
+        }
         nav.hideOnMobile .links > li {
           cursor: default;
           display: inline-block;