BUGFIX:fixed pagination for "upload from CMS" grid field pagination open/8085
NEW Storing page preview states (fixes #8092)
Smaller styling for minor actions in CMS
Re-added 'auto' sizing for CMS preview

Regression from making sizes configurable via JS
Merge pull request #1155 from silverstripe-rebelalliance/open8085

BUGFIX:fixed pagination for "upload from CMS" grid field pagination open...