This is now done via listener directly on the element overlay. The 
overlay's div is made selectable with 'tabindex'. Then the key event is 
caught and delete logic started. The actual logic did not change and 
still deletes all selected elements not just the one catching the delete 
key event.

- This helps getting rid of annoying element interaction and solves some
  selection issues (for example double clicking text elements to bring
  up the editor). While creating units, the placement and properties of
  the elements are important and not interacting with the elements.
  This is what the preview/player is for.
- This may also help with detecting selection for the Delete-key logic.

Mistake while merging earlier.

Newer versions removed some of the package.json variables. Almost the 
same can be achieved by using a config object.

The other one used some deprecated functionality. Also we have more 
control over what is happening now.

* Remove general (full) keyboard in layout component
* Implement French keyboard component

This is now only one field with string value. Unset is put by using 
'none', since mat-select inputs cannot deal properly with null values.

Saving the actual drop down value did not work with duplicate option 
values.

This now uses "closest" to check parent nodes.
This still does not work properly since some elements can not be clicked 
and the event returns the body element. This might be fixed if a way to 
make those elements clickable is found.

This makes a small (suffix) button appear which clears all the input of 
that field.

Applies to textfield and textarea.

Variable naming issue.

Add styles for bar and buttons

All elements get the 'aspect-inserted-element' class, which is checked 
before deleting the element.

When those switches are on the size values are ignored and calculated 
automatically instead.

This makes it easier to define types of objects in surrounding code.

This avoids import cycles.

This keeps import cycles from happening.