When user properties section is collapsed, text editor should expand left:

Collapse icon should be double left arrows inside of a circle, overlayed on the user properties section's right border (near the top), with a short, informative tooltip:

https://fonts.google.com/icons?selected=Material%20Icons%20Outlined%3Akeyboard_double_arrow_left%3A

Expand icon should be double right arrows inside of a circle, overlayed on the border between the message editor and the Dittofeed menu bar, with a short, informative tooltip:

https://fonts.google.com/icons?selected=Material%20Icons%20Outlined%3Akeyboard_double_arrow_right%3A

"Publish Changes" and "Send Test Message" buttons should appear as the following icons respectively, also inside of circles, overlayed on the same border as the expand icon (vertically, below expand button), with short, informative tooltips:

1. Publish Changes https://fonts.google.com/icons?selected=Material%20Icons%20Outlined%3Apublish%3A
2. Send Test Message https://fonts.google.com/icons?selected=Material%20Icons%20Outlined%3Aforward_to_inbox%3A

_{From SyncLinear.com | DF-428}