Support for repo content uploads
Merge pull request #3823 from mptap/repo_uploads

Support for repo content uploads
fixes #5183 - Rename Systems to Content Hosts throughout the UI
Merge pull request #3984 from bbuckingham/system-ui-rename

fixes #5183 - UI - Rename 'System' to 'Content Host'
fixes #5233 - System Groups UI - fix cross-linking to the systems page

The cross-linking is using the active record id; however, the systems
page expects the system uuid to be used.