[Widget] Dropdown should be able to capture keystrokes to quick select desired value

[srirambv]

Description

In the current implementation of widgets, dropdown list doesn't capture keystrokes to select a value. Since the dropdown is quite small, selecting values from the dropdown list can cause some uncomfortable scrolling and clicking to select the value. Keystrokes should be captured to make it easy to just type in and auto-select value

Steps to Reproduce

1. Open any widget which has a dropdown
2. Try to type in to select the desired value
3. Doesn't work

Actual result:

Dropdown should be able to capture keystrokes to quick select desired value

Expected result:

Should capture keystrokes to make selection easier

Reproduces how often:

Easy

Brave version (brave://version info)

All

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? NA
• Does the issue resolve itself when disabling Brave Rewards? NA
• Is the issue reproducible on the latest version of Chrome? NA

Miscellaneous Information:

[rebron]

cc: @AlanBreck When you get a chance, take a look as we're implementing drop down lists for Crypto.com v2.

[AlanBreck]

The reason that this isn't capturing keyboard input is because we're not using a <select> element, therefore we'd have to build in any sort of keyboard capturing ourselves rather than leverage native browser functionality. Unfortunately, <select> doesn't give us ample styling opportunities for the options, we'd have to go one of two directions:

1. Build our own version of a <datalist> type functionality which has a text box the user enters to filter through a list: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/datalist
   Note: here again, we can't use the native <datalist> element, but we would recreate something like this.

2. We don't add an input field and instead create our own way of capturing keyboard events to auto select list items. See really rough example here: https://nsfw8.csb.app/

cc @jamesmudgett @rebron