I would really welcome if the HTML browser window would act more similar to the other windows. Especially the missing VCS plugin checkin/checkout procedures are missing.
But also other menu items available for the window or the selected text (as in other windows) are missing.
An HTML Window is indeed quite different from other window types. It does not allow you to edit the HTML, there is no SQL or PL/SQL, and so on. Therefore many functions do not apply (such as check-in and check-out).
That's the current state, I know. I was asking to change it into the outlined direction. Having the documentation more and more a 'first class citizen' of the software development process I was asking for a more tight integration into all activities inside PLSQL developer.
I could also imagine to have a 'Document Project' action on the project window.