Freewin Plugin Now Works With PyQt6

[tbp1...@gmail.com]

With the latest version of the devel branch, build c6baa0090b, the Freewin plugin has its full rendering capability under PyQt6.  The PyQT6 version must be at least 6.23.  You may also need to install  PyQt6-WebEngine, which is available via pip from PyPI.  The new version of FW is 1.8.

The Freewin plugin lets you open a free-floating window that contains the body of the node that was selected when it was opened.  The window allows light editing, which is saved back to the host node.  If you navigate in the main Leo window away from the host node, the Freewin window still views the original host node.

The window has an alternate rendering view, which renders the node assuming that it is in RestructuredText.  It is this rendering capability that has been restored with this release.