MessageBar : show less button don't work

When you click on the button (+) on the left of the message bar to close the menu with more buttons it don't work. The menu remains displayed.

assigned to @cberthet

Does this relate to:

• #1309 (closed)
• #1125 (closed)

Thank you

Will pressing the Esc key also update the caption from Show less to Show more? Thank you

closed

mentioned in commit 65cc7a36