Broken Toolbar icons when using space-wide banner

Bug Summary:

Broken Toolbar icons when using space-wide banner

Environment:

Confluence 6.9.1, Google chrome, PostgreSQL 9.5

Bug description

Broken Toolbar icons when using space-wide banner

Steps to replicate

1. Add space-wider banner to any space according to How to add a space-wide banner:
2. Open the page belonging to above Confluence space and access edit mode.

Expected results

Actual results

Some toolbar components are nor rendered correctly