User can accidentally share parent folder

[ScharfViktor]

Version | 5.1.0-prealpha+0ac03d8a8
web 9.0.0-alpha.5

Steps:

• create folders mainFolder/subfolder
• go inside the mainFolder
• open share dialog and before creating share and link -> make right click
• create share or link of the subfolder

Actual: user accidentally share parent folder. Yes, right sidebar has title mainFolder but the user may not notice it

Expect: Right-clicking does not switch the sidebar to the parent folder. don't confuse the user 😀

[kulmann]

Fixed via #10936