Revised comments Dec 2020

• Implement floating comment creator
• Add screens support
• Add external open ability
• Implement replies list
• Implement load early/next
• Fix floating comment and android keyboard
• Fix issue with the touchable on android
• Fix navigation crash on the swiper
• Fix View reply is hard to tap on Android
• Implement options menu using the new component
• Explicit comments
• Comments visible on swiper while swiping
• Media in comments
• Embedded links
• Edit mode
• Add attachment support to input with preview
• Add embedded link preview to input
• Remove old code
• Fix crash in portrait swiper
• Refactor group screen to use new comments
• Refactor blog screen to use new comments

closes #2903 (closed) #2938 (closed) #2939 (closed) #2725 (closed) #2928 (closed)