1425: Add Glossary sorting

[pedro-mendonca]

Add sorting to columns Item and Translation.

• Add tablesorter to Glossary view
• Set sorteable columns with properties set within ´´
• Set rows with class editor as child rows to keep below the parent on sorting
• Update CSS to only show the arrow sort icon and cursor pointer on sorteable column headers

Fixes #1425

[pedro-mendonca]

@ocean90 initially I've added the script to the bottom of the glossary-view.php as in the project.php, but as we have a glossary.js, thought it would be better to add it here.
Let me know what do you think is best.

I left the minifcation for after your review.

[pedro-mendonca]

There is still an issue on clicking the details, the row is not in the correct order.

Another thing, might be better to add the 'sorter' ID on the <td> to avoid future mapping issues, as some columns are optional, depending on the editing permissions of the user.

[pedro-mendonca]

On e78b9a7 the editor rows are always after the main row, fixing the sorting issue.