*pt64865112* Clean up save/publish buttons on Issue TOC page.
*pt64864438* Hide 'Preview Issue' link on Issue Data page.
*pt64857768* Hide 'Cover' fields on Edit Issue Metadata page.
*pt64865112* Add pop-up warning when updating ToC for published issue.
*pt64865112* Fix js syntax.
Merge branch 'bhui-fix-issue-toc-buttons-Feb13' into eschol_prod