Direct line reconnects to the bot framework after minimiz and maximiz the bot window in the browser

• The impact :
  The user will receive a welcome message after every time he changes the window size

• Test environment:
  1- Download the minimizable web chat example
  2- Then update web chat from 4.5.1 to 4.6.0
  3- After reciving the welcome message from the bot click on minimz button then click on maximiz button

• Please find below the screenshot attached for reference.
  First connection
  

After minimiz and maximiz the window

Web chat version 4.6.0