Reference name for menu icon

[goobee01 1]

OK, no laughing as I'm sure that I'm not calling it by its correct name but does anyone know the reference name for the 3-lines (hamburger) menu button? 

I'm trying to hide it and what I'm doing is not working as I would like.

.paper-icon-button-light.md-icon.headerSectionItem.headerButton.headerMenuButton {display: none;}

This is too aggressive as it also hides the "Play All, Shuffle and Sort by File name" buttons that I want to keep.

Thoughts?

On a associated tangent, is there a data dictionary for all of the elements?  It would help in the identification of the elements.

 

[Happy2Play 9780]

Something like this

div.headerSection [title="Menu"] {display: none;}

 

[goobee01 1]

Awesome, thanks Happy2Play