Annotations from previous workflow remain visible when opening or creating a new workflow

[glopesdev]

The browser panel can be opened to display operator documentation or rich annotations embedded in the workflow.

#1311 and #1361 made sure to clear the annotation panel in case the corresponding node is deleted, but no provision was included for clearing the annotation and documentation panel when reloading a new workflow into the editor, and so it may remain open pointing to contents from previous workflows.

Possibly the most conservative solution is to close the browser panel by default when a new workflow is loaded. This way we can later add provisions in the workflow settings file to keep track and restore the last opened panel if necessary.