The buttons are without any space between - this is because of wrong CSS selector in datagrid.css - extra div is now needed - fixed by modifying CSS selector
The export buttons are on new line - this is because of the new snippet div (the export toolbar is outside of it) - fixed by CSS property display of new div set to inline-block
See issue #1101
Summary
After commit 55fd8b4 the toolbar looks wrong:
After these changes, toolbar looks better: