Improve Session documentation

[pryrt]

resolves #779

[pryrt]

@xomx,

• I corrected the mistake you pointed out
• I added a section to include your information from the original Issue's discussion

Let me know if this looks good to you.

[alankilborn]

@xomx Speaking of registry edits... Is this section of the manual up-to-date?: https://npp-user-manual.org/docs/shell-extension/#manual-edit-with-notepad-action
I ask because I remember you recently providing some registry code to a user (of course, I can't find the relevant posting now) for this, and I'm wondering if that was different from what's in the user manual.

[xomx]

@alankilborn

I remember you recently providing some registry code to a user

You mean this? notepad-plus-plus/notepad-plus-plus#16165 (comment)

Is this section of the manual up-to-date?: https://npp-user-manual.org/docs/shell-extension/#manual-edit-with-notepad-action

I think not (for Win11 it enables for me the old ctxmenu only (and not until I logoff/logon).
Its logical - for the new Win11 one, you need the new NppShell with its sparse msix, editing the Registry is not enough anymore.

@pryrt
Could you modify also that part? I mean something simple - instead starting the Manual “Edit with Notepad++” Action paragraph with "You can manually add an “Edit with Notepad++...", using e.g. "For older classic context menu (known from the Windows 10 and older), you can manually add an “Edit with Notepad++..."

[pryrt]

The https://npp-user-manual.org/docs/shell-extension/#windows-11-right-click-workarounds section immediately below was supposed to clue people in that Win11 behavior was different. But it apparently wasn't obvious, even to two experienced users as yourselves, so I added @xomx's prefix, plus an indication+link that there are Win11 workarounds later in the doc.

(And @alankilborn , if someone had made such a "speaking of XYZ" comment in a main-app Issue comment, you would have been the first to chime in that "it should go in a separate issue"... I was rather surprised to see your tangent here. :-) But I didn't feel like creating a new branch, so I just included it in this PR, despite being unrelated.)

[alankilborn]

@xomx

Thanks for repying to my off-topic post.

for the new Win11 one, you need the new NppShell with its sparse msix, editing the Registry is not enough anymore.

Ah, that's unfortunate.