Release v1.4

[jadjoubran]

• [x] finalize testing for open issues
• [x] write documentation for webdash config
• [x] close milestone
• [x] close project for v1.4
• [x] release webdash 1.4
• [x] draft release notes
• [x] announce on twitter + webdash PWA (using Chrome canary)

[jadjoubran]

• Release tweet
• v1.4 release