Fine-tune the number of rows needed for preview resources

[akariv]

Choose a good number of rows for previewing the data (based on our current core datasets).

[zelima]

@anuveyatsu Can you decide on this?

[anuveyatsu]

@zelima I think 1k is pretty enough. Do you ever scroll a table with 1k rows to the end? I think even 100 would be OK, but let's do 1k for now so it should improve the loading speed of some large datasets.

[zelima]

Hm... this makes me think about how we are going to deal with sorting data that is time sensitive. Eg: for Finance Vix, that is updated daily, we need last 1000 rows (or maybe first for other datasets), to display the latest data
cc @rufuspollock and @akariv

[zelima]

FIXED. As discussed in person we reduced it till 200. Followup showing first/last part of dataset here #39

[zelima]

This is back to 10,000 now, as suggested by @rufuspollock