Steps to Reproduce

http://zkfiddle.org/sample/29rtmf/1-ZK-4243

• Clear the browser cache first then Run the sample.
• Check the buttons are on the same line.

Current Result

The buttons aren't on the same line.

Expected Result

The buttons should be on the same line.

Debug Information

If the web fonts are cached, the result will be okay.

If web fonts are not loaded yet, they are loaded only after being used for the first time.
The width of <i> might be changed when loaded.
https://www.zachleat.com/foitfout/#4000,4000,4000,4000

Workaround

Add z-icon-fw in sclass for fixed-width icons (e.g. "z-icon-fw z-icon-search")