[feature] choose how many months will be shown

[givanse]

if I pass:

showPrevMonth=false
showNextMonth=true

The un-calendar stays at a size of three months, but only two are shown.

This feature would allow me to also display 4 or more months at the same time.

[ghedamat]

and yup, another one that we missed @givanse , not sure if @heycarsten has ideas here.

[heycarsten]

In some ways I feel like it's too configurable, but you're right, it shouldn't show an empty space.