Minor: Toolbar And Panel Icons Don't Match

While I was creating a pop-up toolbar for panels visibility for myself, I discovered that icons for environment panel in toolbar and panel tab do not match each other. They should be same in the next release.

Different icons also in “Named Positions” button and tab.
Also there are no buttons for Snapshots and Notifications panels.
Document User Text panel has no option even in command line. You have to close it manually.