Merge pull request UnigramDev#1857 from UnigramDev/develop

v4.2

Merge pull request UnigramDev#1826 from UnigramDev/develop

v4.1 (5217)

Merge pull request UnigramDev#1821 from UnigramDev/develop

v4.1

Close file sender when deleting the last picture

Resolves UnigramDev#1669

Add an explanation when creating a poll

Refactored filters to folders

Public polls, multiple answers, quiz

Default.rd.xml

Recompiled rlottie using VS 16.2.5

Removed Reveal from chat list for real