MDL-31830 course: fixed up minor points as noted by Damyon's integration review

* Fixed typo breaking drag and drop of courses.
* Fixed the ' ' title for the create new button plus two other icons I found as well.
* Adding padding to items displayed in the action menu drop down. base + bootstrapbase.
* Padding adjusted to the same as on the course page. base + bootstrapbase.
* Removed hover icon from categories. base only.
* Fixed categroy typo
* Removed min-width that was being applied to coursename making its clickable area larger than normal.