Ability to change max height of preview window

[ribru17]

Is your feature request related to a problem? Please describe.
I sometimes have large popups when running gs.blame_line { full = true } and it would be really nice to be able to limit the height of these popups so that I can just focus into them and scroll around without being too disoriented and being able to still see most of my original buffer.

Describe the solution you'd like
Maybe some sort of option in the setup to configure a maximum popup window height (preferred for greater flexibility), or for the preview windows to respect the pumheight option.

Describe alternatives you've considered
Just using gs.blame_line { full = false } but it's not the same :(

Additional context
None

[daedroza]

@ribru17 : How did you scroll the blame preview and navigate it?

[ribru17]

@daedroza Once you bring up the preview window, hit the same keys (that you brought it up with) again to jump into the window, then you can scroll it with e.g. <C-d>, and navigate it like a buffer