colibris: the "ok" button was misaligned in Chrome
colibris: the "ok" button was misaligned in Chrome

When visiting Etherpad's home page with Chrome the "ok" button was not on the
same line as the pad name text box. On Firefox & Safari there was no problem.
Tested on Chrome 74.

Fixes #3604.

joequant/etherpad-lite,aptivate/etherpad-lite,joequant/etherpad-lite,aptivate/etherpad-lite,storytouch/etherpad-lite,ether/etherpad-lite,joequant/etherpad-lite,aptivate/etherpad-lite,ether/etherpad-lite,storytouch/etherpad-lite,joequant/etherpad-lite,aptivate/etherpad-lite,storytouch/etherpad-lite,ether/etherpad-lite