[For 1.8] Thank You/Like System v3.3.6 + MyAlerts support

[h2o]

Did it , as mentioned above but have same issue !

This is strange, the button in the Default theme should appear to baseline after changing that code, I've tested it in Edge browser, Firefox, Chrome, Opera, Maxthon, Cliqz, in all of them it is like it should be.

Sorry, this is a stupid question, but did you tried to delete cache after the code change?