Closes #1115: link to repo_browser

 - adding a link
 - editing the i18n
 - deleting the css method background: inherit;
Closes 1104: Indicate to the grader a post deadline submission

 - Adding a warning icon in submission/browse before the date
Correction of useless argument
Merge pull request #1118 from GhiGt/corrections-useless-attr

Correction of useless argument
Merge pull request #1117 from GhiGt/issue-1104

Closes #1104: indicate to the grader a post deadline submission
Merge pull request #1116 from GhiGt/issue-1115

Closes #1115: link to repo_browser