Ensure row numbers functionality in dataframe works as expected

[hannahblair]

Description

This PR:

• Adds the show_row_numbers param which seemed to get lost in a merge
• Allows you to sort by row numbers in the data frame component
• Updates the sort by icon. let me know what you think; I don't love the other arrow that we use (I'm aware we use this elsewhere though)

Closes: #10411

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@gradio/core	patch
@gradio/dataframe	patch
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Ensure row numbers functionality in dataframe works as expected

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[abidlabs]

Thanks @hannahblair, this looks great to me! A couple of nits, I'll note below, but which are non-blocking. I'm also cc-ing @hysts for his review

[abidlabs]

1. It looks like adding show_row_numbers=True still affects the width of the first column. I know you are addressing widths separately, so non-blocking, but here's what I'm seeing:

Repro:

import gradio as gr
import numpy as np

np.random.seed(0)
data = np.random.randint(0, 100, size=(10, 10))

with gr.Blocks() as demo:
    gr.Dataframe(value=data, show_row_numbers=True)
demo.launch()

2. Really like the new icons, including the ability to reverse the dataframe by sorting the column numbers backwards and the animation flourish that happens when you reverse a column sort. My only suggestion would be to indicate the directionality of the sort by only highlighting the up arrow or the down array depending on whether the columns are sorted ascendingly / descendingly:

[hannahblair]

@abidlabs I've removed the fixed width on the row number header and I've also changed the sort icon to have corresponding up and down coloured arrows. Let me know if that looks good to you!

[abidlabs]

Thanks @hannahblair!

Yes, the updates look great! Still have a couple of minor suggestions:

• The row number column is pretty wide, would be better to make it narrower
• If you click on the sort icon three times, it resets to the original unclicked state. Does that make sense semantically? I mean the column is still sorted so perhaps you shouldn't be able to unselect the sort icon by clicking on it -- only if you click a different column should the previous column be "unsorted"

[hysts]

Looks great! Thanks @hannahblair

+1 for both two points @abidlabs mentioned above.

Also, regarding the second point, would it be possible to split the sort icon into two separate icons? I've always found it a bit inconvenient to have to press the arrow icon twice to sort in descending order. It would be more convenient if pressing the up arrow sorted in ascending order, pressing the down arrow sorted in descending order, and pressing the currently selected button again reverted to the original order.