Clean up lint under polygerrit-ui

This change cleans up all lint errors reported by gjslint,
with the exception of third-party code in the gr-linked-text
element and everything under bower_components:

$ gjslint --custom_jsdoc_tags event --check_html \
    -e bower_components,gr-linked-text -r app
Skipping 577 file(s).
181 files checked, no errors found.

Change-Id: I080d58bdd33b2d4b8dd22a717f06eebd7bbfb63d
diff --git a/polygerrit-ui/app/elements/shared/gr-storage/gr-storage_test.html b/polygerrit-ui/app/elements/shared/gr-storage/gr-storage_test.html
index 4e17cb6..d826577 100644
--- a/polygerrit-ui/app/elements/shared/gr-storage/gr-storage_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-storage/gr-storage_test.html
@@ -100,7 +100,7 @@
       // Create a message with a timestamp that is a second behind the max age.
       storage.setItem(key, JSON.stringify({
         message: 'old message',
-        updated: Date.now() - 24*60*60*1000 - 1000,
+        updated: Date.now() - 24 * 60 * 60 * 1000 - 1000,
       }));
 
       // Getting the draft should cause it to be removed.