Support `animation="none"` in spark-overlay
Use `animation="none"` to tempoarily mask the issue with blurry fonts on menu opening
Fix broken opening/closing sequence for animation="none" (menu became invisible, but was still accepting clicks)
Fix the comments
Merge pull request #1945 from ussuri/fix-blurry-fonts-in-main-menu

Workaround blurry fonts in main menu
Merge remote-tracking branch 'upstream/master' into move-menu-back-to-spark_polymer_ui