Quickly navigate to line number in blame view

[ilyagr]

Is your feature request related to a problem? Please describe.
When I open the blame view, I have to scroll down to the piece of code I care about, often many lines down.

Describe the solution you'd like

A way to type in the line number to jump to (e.g. so I could type Shift-L, 151, <Enter>).

Describe alternatives you've considered

Specifying the file (and line) in the command line, as suggested in #1382, would also be great.

[extrawurst]

Yeah I would like to have a general reusable popup to use this in a bunch of places