Add 25/75 backend layout
Fix for columns in backend layout
Merge pull request #100 from aimeos/master

Add 25/75 backend layout
[TASK] Cleanup CGL
[BUGFIX] Wrong colpos was used in layout "Default, Subnavigation Left and 2 Columns" fixes #98
[TASK] Include respond.js with conditional comment to work with static cache - fixes #101
[RELEASE] Release 6.2.7
[TASK] Set version to 6.2.8-dev