Back and close buttons have no horizontal spacing in Blueprint dialog

Main

• Just a small fix in CSS
• Fix in confluence-create-content-plugin

No automation test
Notes:

• Build: https://confluence-bamboo.internal.atlassian.com/chain/result/viewChainResult.action?planKey=STABLEBLUEPRINTS-CC&buildNumber=218

See attached screenshot.

This only happens when there is an error of some sort and the 'Create' button is not present.