Feature: #97667 - Add keyboard support for Multiselect¶

Description¶

You are able to use the keyboard for selecting and deselecting options in Multiselect.

• Enter adds options, either from right to left or left to right
• Delete or Backspace removes an option for windows/mac users
• Alt + ArrowUp moves the option one up
• Alt + ArrowDown moves the option one down
• Alt + Shift + ArrowUp moves it to the top
• Alt + Shift + ArrowDown moves it to the bottom

More combinations are possible by default:

• Shift + ArrowUp includes the upper option
• Shift + ArrowDown includes the lower option
• Home moves the cursor to the top
• End move the cursor to the bottom

Impact¶

This currently affects the following TCA configurations:

• 'type' => 'select', 'renderType' => 'selectMultipleSideBySide'
• 'type' => 'group'
• 'type' => 'folder'