Add an option for whether or not cards in the card lens should be scrollable

[taylorhadden]

Need to resolve what the "default" should be.

1. Having them be non-scrollable would probably match most users' default expectations.
2. Having them be scrollable might be odd for some, but it would make the option more discoverable ("Can I turn this off?"). The users that like it would not have to discover the option.

[miroklarin]

Scrollable sometimes help to have quick preview, but it is only usable when there are less number of notes on the screen, and titles are not long.
With smaller note preview size on larger lists, scrollable is not very useful as title cover most of the note and you only have 2-3 rows of content visible, in case of note title breaks in 2 or 3 rows. Btw, title size could be responsive.

[taylorhadden]

I like the idea of a more responsive title size in this context. It probably could be smaller in general as well.

I wonder if I can do something where the cards are only scrollable if you, say, hold alt.