Generate roof plugin

[dorin]

New version 5.3.1
Is available here, at the bottom of this tread, and on SourceForge, as well as through the Plugin Manager.

News:

• Fix the LaF navigation panel so that it displays correctly in all situations SH3D and DD3D (Java 8, Java 26, Metal, Nimbus, and all FlatLaf options).
• Fixed an error that occurred when calculating roof windows (thanks to @author rg-software-sf, a SourceForge user name).

Many thanks to rg-software-sf, who discovered the problem, explained to me what was going on, and offered me a good solution.
It would have taken me a few months to come up with an acceptable solution, which proves once again that I'm not a programmer.
@rg-software-sf You're right, or, in AI style: “You're absolutely right!”