feat: keep Following changes for later (Closes #1320)

tests/e2e/test_mobile_following_release.py

@@ -77,6 +77,15 @@ def test_following_queue_is_phone_usable_at_narrow_viewport(viewport):
           {status:'ready'}, document.querySelector('#watch-search-result'))""")
         expect(retire).to_have_text("Watch pull request")
         assert retire.bounding_box()["height"] >= 44
+        keep = page.locator("#keep-following-for-later")
+        page.evaluate("document.querySelector('#keep-following-for-later').hidden = false")
+        expect(keep).to_be_visible()
+        expect(keep).to_have_text("Keep for later & next")
+        assert keep.bounding_box()["height"] >= 44
+        assert page.locator("#keep-following-status").evaluate(
+            "node => getComputedStyle(node).overflowWrap"
+        ) == "anywhere"
+        assert page.locator("#keep-following-status").bounding_box()["height"] >= 20
         overflow = page.evaluate("document.documentElement.scrollWidth > document.documentElement.clientWidth")
         assert overflow is False
         browser.close()