Implement proper textbox component

[pinussilvestrus]

What should we do?

As a follow-up of https://github.com/bpmn-io/properties-panel-next/issues/9#issuecomment-843950441, we should investigate a proper text box component we had in the old properties panel.

In comparison to a normal text area, it auto resizes to its content (to a certain extend).

Why should we do it?

Normal text fields and text areas are not flexible enough when it comes to multi-line editing.

[andreasgeier]

Let's not do that too quickly. Although an auto resizable text area is a nice start, it might be not the preferred solution. For instance, the editor modal in Operate or in this plugin is also a possible solution.

I would recommend a concept task before we decide how to continue. For now, a static text area should be fine.

[pinussilvestrus]

Yeah, I added the issue to backlog to indicate we're not working on it right now.

[shade-belisar]

I would like to express my interest in this feature. My client was very happy when they got to use the old, resizing fields (they have very many fields with sometimes dozend or more lines) and are not looking forward to loosing this with the new panel.

I am uncertain if I can help with this issue (don't know how comlicated it is relative to my skill level), but if you need any more info on how / why this would be used (for example for the concept task) I would gladly be of assistance.