Fix avatar issue in chat, HTML5 #3830

[HTML5] Fix unauthorized for slow connections

[HTML5] Settings localization dropdown

Fixing stack overflow when opening screenshare window

Update locales

Tested uploading of presentation.

 - download only tanslated locale strings (tx pull -a --mode=onlytranslated)

Fix focus chat message list key and label

* upstream/master: (51 commits)
  Fix lint issues
  Fix lint issues
  Fix a few lint problems
  fix missing import causing breakouts to not work
  Delete the initially converted swf to be sure that if fallback convertion does not work we get the blank swf loaded.
  Fix poll options remain visible on html5, closes #3806 HTML5
  - user internal userId instead of external userId in register user message
  remove unnecessarily added svgs
  updated icons to v11, adjusted few icons
  Fix merge algoritm problem
  set chat input color to gray (text-color)
  Fixed user leave problem on private chat, close #3799 HTML5
  align emojis horizontally
  Check userId when validating token
  Cleanup  - remove extra > on meeting name on getRecording API response
  Check for WebRTC availability instead of checking for the browser name to display the AudioSelectionWindow browser hint.
  fix event name causing issues with listenOnly status
  Display "Recommend using either Firefox or Chrome for better audio" when any of other browser is used.
  improved logic for updating message-list
  Change to fetch from chat system id, issue #3792 HTML5
  ...

[ HTML5 ] - Accessibility update 04

* upstream/master: (26 commits)
  Fix lint issues
  Fix lint issues
  Fix a few lint problems
  fix missing import causing breakouts to not work
  Delete the initially converted swf to be sure that if fallback convertion does not work we get the blank swf loaded.
  Fix poll options remain visible on html5, closes #3806 HTML5
  - user internal userId instead of external userId in register user message
  remove unnecessarily added svgs
  updated icons to v11, adjusted few icons
  Fix merge algoritm problem
  set chat input color to gray (text-color)
  Fixed user leave problem on private chat, close #3799 HTML5
  align emojis horizontally
  Check userId when validating token
  Cleanup  - remove extra > on meeting name on getRecording API response
  Check for WebRTC availability instead of checking for the browser name to display the AudioSelectionWindow browser hint.
  Display "Recommend using either Firefox or Chrome for better audio" when any of other browser is used.
  improved logic for updating message-list
  Change to fetch from chat system id, issue #3792 HTML5
  Fix multiple welcome messages, issue #3792 HTML5
  ...

Improve the document conversion fallback logic by merging the pdf page extraction and image conversion using 'convert' to a single step page to image conversion using 'gs'. Anti-aliasing for text and shapes is also improved.

Make sure that blank swf is loaded if fallback document conversion does not work.

Fix poll options remain visible on html5, closes #3806 HTML5