Update column picker

[mark-prins]

Fixes #5396
There's been some chatter on this one, so I thought to tidy it up. This builds on the work of myspace20 🙏 and implements the changes discussed after.

👩🏻‍💻 What does this PR do?

• Hides the selection column in the column picker
• Adds a 'Show all' button which is enabled if some columns are hidden
• Renames the selection column to be Select / unselect all rows
• Hides the selection column if all columns are hidden

💌 Any notes for the reviewer?

🧪 Testing

• The selection column isn't shown in the column picker
• the tooltip of the selection column says 'rows' not 'columns'
• hiding all columns also hides the selection column
• a 'Show all' button is shown in the picker
• and is disabled if all columns are shown
• and enables all columns if clicked

📃 Documentation

• Part of an epic: documentation will be completed for the feature as a whole
• No documentation required: no user facing changes or a bug fix which isn't a change in behaviour
• These areas should be updated or checked:
  1. Need to update screenshots and column picker deets

[github-actions]

Bundle size difference

Comparing this PR to main

Old size	New size	Diff
5.02 MB	5.02 MB	563 B (0.01%)

[mark-prins]

Side quest: fixed the date test

[roxy-dao]

Nice! Thanks Mark :D