The property vertical-align is interpreted differently by Chrome based
browsers, so a special webkit value is needed to override the value. The
browser specific value is used last, so it is used by browsers which can
interpret it.
#414

- text field simple
- toggle button

(The array reference must not be destroyed)

#405

#381

#409

- Add cdk scrolling strategy to keyboard that brings overlays to
scrolling

Drop lists that allow only one element but are not used in cloze texts
display their elements right-aligned

- Add left and right padding for input field

- Set the duration of highlighting anchors to 15 seconds
- Disable simultaneous highlighting of anchors

- When the height of the child elements of a cloze element is increased,
they all now grow out of their center

Read-only math fields are displayed without borders

HTML labels can cause errors in the Test Center for units in XML format.

- Show the error message only after the math field has been touched
- Add styles for error message