bump Typhoeus and refactor HydraWrapper
Changed post/comment submit keyboard shortcut to ctrl+enter from shift+enter

Fixes reopened #3897
Add back-to-top button on tag and user pages
Merge pull request #4191 from svbergerem/4185-BackToTop-other-streams

Add back-to-top button on tag and user pages
Add participants preview con conversations
fix stupid heredoc usage in script/server
Merge pull request #4162 from MrZYX/typhoeus

bump Typhoeus and refactor HydraWrapper
Merge branch 'reoponed_issue3897' of https://github.com/RoonyH/diaspora into RoonyH-reoponed_issue3897
Merge branch 'add_conv_participants_preview' of https://github.com/marpo60/diaspora into marpo60-add_conv_participants_preview
use tooltip plugin to display the name under the avatar

(temporary solution until the proposed solution from the
[pull request](https://github.com/diaspora/diaspora/pull/4149) is
implemented)
bump configurate
fix failing conversations cuke
add failing spec for #4160
extend the spec a bit more
refactor mention handling in a status message
add method for filtering mentions by aspects
wire mention filtering into the status message model, adapt a few tests to
work properly