Vim-like scrolling relative to cursor (zz)

[ovk]

In Vim there's a set of commands for scrolling contents of a window relative to cursor. Arguably, the most widely used one is zz, which scrolls the contents of the window such that the current line (line with the cursor) is centered in the window.

Is it possible to have similar behavior in Tig? I checked the manual for tigrc and contrib/vim.tigrc file but could figure out a way to do this.

On somewhat related note, it would also be nice to have H/M/L motions for quickly moving cursor around the window.