* scrolling fixes:
- jumps on free scroll when somebody posts a new message (and old one disappears at top)
- jumps on closing RHS (no compensation of resize)
- scroll blinking on opening/closing RHS (delay before resize compensation)
* fix scroll slipping up on multiple open/close RHS in case when (this.refs.postlist.offsetHeight % Constants.SCROLL_PAGE_FRACTION === 0)
* PLT-3182 - Improving switch channels modal and some minor UI improvements
Enabling link previews
Adding compact layout to RHS
Improving timestamps
* Adding update code for RHS components
* PLT-2321 Move the toggle icon next to the link being previewed
only applicable to one-line messages started with link
* remove useless "Youtube" header when no title is available
* allow breaking long links instead of toggle
* simplify "/" to "/<wbr />" replacing
fix empty post without additional content body
* discard buggy "simplification"
* Refactored posts view to use view controller design
* Add post view caching
* Required updates after rebase
* Fixed bug where current channel not set yet was causing breakage