TYPO3 Core

The softhyphen button is still active if switched to source editing mode.
If clicked in source editing mode, a softhyphen is added to the first element.

1. As an editor, I'd either expect the button to be disabled or to insert a softhyphen entity at the current cursor position.

2. As an editor, I'd expect softhyphens to be visible also in source editing mode (shy, #173).

3. As an integrator, I'd like softhyphens to be stored as entities (shy, #173).

4. The button has no tooltip (see @ckeditor/ckeditor5-ui/src/button/button::tooltip). As an editor, I either need a tooltip or button text to identify the button action. Bold and Italic both have the assigned shortcut - "Bold (⌘B)" and "Italic (⌘I)" on macOS - added to the tooltip.

5. Activating the button focuses the button and removes the cursor from the content section. As an editor, I'd expect the cursor to be placed after the inserted value as in all other commands (bold, italic, etc.). If the action is applied to a selection, I would expect the selection still intact.