DOC-3043 Platform JAVA APIs: Improve English and consistence

DOC-3043 : Improve Javadoc of API-Settings Context
SOC-3385 | Incorrect UI of Attach File - Select/Upload file in intranet home
Merge remote-tracking branch 'origin/feature/stabilization'
SOC-3924 | The tooltip when mouse on the file uploaded is default style, need to apply tooltip style for it.
Merge branch 'feature/stabilization'
Merge master into feature/pdf-js branch