This makes the list not collapse when used in dynamic context.

Those are wanted by the product owner.

Also improve tooltips.

- Fix reading values from combinedProperties object. This object has the
needed property in its root.
- Don't show alignment buttons in dynamic mode
- Make the small input fields a little wider so the placeholder text
does not overflow, when there is no valid value to show. This may happen
when multiple elements are selected, which have differing values.

- Move the method to the unit service, so the proper 
updateElementProperty method can be used.
- Also improve the logic, reducing variables.

Only select the element component when it is not already selected. This 
prevents delesecting elements which have been multiselected.

This prevents the section from being placed in front of elements
with negative z-index

This complicates styling and is somewhat useless as the border can also 
be removed by setting the border-width to 0.

Elements are supposed to be centred when this setting is used. Since it 
is the same CSS for almost all element components it is put into global 
styles.

Missing components: video, spelling.

Better logical order with featrures first and bugfixes last.

This reverts commit 87534c53.

Correct german form: 99-66

This creates a blockquote-element, which is styled globally with 
specific quotes and alignment.

Images are always inline and scaled down to the font size of the text 
element as a whole.

TipTap for the newest beta features and jasmine because of some 
dependency error npm was showing.

Outline may be shown when valid dropLists are highlighted. The bottom 
patr of the outline is cut off when the whole width is used by the 
dropList.

Section was picking up the size of children elements. With relative it 
works.

The inline style makes problems with fixed sized elements in dynamic 
sections.

This change needs to be reviewed thoroughly.

This allows elements in dynamic sections to have fixed dimensions.

Some modifications to property panel logic, to show dimension fields and
proper labels.

Only implmented in dropList and button elements.

The child elements are created directly in the component when reading a 
serialized cloze.

The whole parsing process of cloze elements will be reworked soon. So 
this probably is a temporary fix.

Fix a problem when saving compound children

see https://github.com/iqb-berlin/verona-data-specifications/blob/main/responses/manual_iqb-standard.md