Improve note pinning

[streetwriters]

If a note is pinned in a notebook, it should be pinned in this notebook only and not also in the "all notes view".

I have a lot of notebooks with a lot of notes that i want to pin, but i cannot do that. Because if I do, the "all notes view" is full of pinned notes that are only relevant when I'm in the corresponding notebook.

So, while it's a very useful feature, its implementation makes it unusable.

Device information:
App version: 3.3.7-c560685-desktop
OS: Windows 10 64-bit
Browser: Electron 37.6.1
Plan: Pro (legacy)