Cannot use Tab to move to columns

[alexstine]

Steps:

1. Insert a table block.
2. Select Create Table button.
3. Press Tab key to move to the second column.
4. Notice how focus leaves the block and arrives at the sidebar.
5. I expected focus to land in the second column and only reach the sidebar after the field labeled Caption.

This is related to writing flow. Just can't figure out how to adjust the logic here.

[costdev]

Reproduction report

Environment

• OS: Windows
• Server: WSL2 (Ubuntu)
• Browser: Google Chrome 101.0.4951.54
• WordPress: 6.1-alpha-53344-src
• Gutenberg version: with and without Gutenberg 13.1.0 active

Steps to reproduce.

• Insert a table block.
• Select Create Table button.
• Press Tab key to move to the second column.
• 🐞Notice how focus leaves the block and arrives at the sidebar.

Results

• Issue reproduced. ✅

[t-hamano]

I developed a table block plugin with tab key navigation.
This is not an extension of RichText, but rather the logic to detect keyboard events within a block.
I am sure there are many improvements that could be made, but I hope this will be helpful.